OPINION

ROGERS, Circuit Judge.

Laquinton Perry, having conditionally pled guilty to conspiring to possess narcotics with intent to distribute, appeals the preserved evidentiary issue of whether a search warrant for Perry's apartment was supported by probable cause. Perry contends that the activities indicating drug sales that were observed over the seven weeks before the issuance of the search warrant were stale evidence because the activities were not individually dated. The observations, according to Perry, may have been too old to indicate that drug evidence would probably be found in the apartment, while at the same time not concentrated or old enough to indicate continuous or entrenched criminal activity. Even without specific dates, however, the amount of suspicious activity observed within the seven weeks in connection with Perry's apartment was enough to support probable cause in this case.

At the probable cause hearing in Tennessee state court, Lieutenant Jason Drewery of the Fayette County Sheriff's Department swore in an affidavit as follows:

Based on that affidavit, the Tennessee magistrate issued a search warrant on December 5, 2014, two days after Lt. Drewery's surveillance ended. Lt. Drewery executed the warrant on December 9.

Because Lt. Drewery's affidavit detailed multiple transactions involving Perry and his girlfriend that appeared to be drug transactions, and because those transactions corroborated the neighbors' complaints that Perry and his girlfriend were selling drugs, the Tennessee magistrate properly issued the search warrant under the Fourth Amendment.1 Lt. Drewery's affidavit provided the Tennessee magistrate with the requisite substantial basis for finding a fair probability that illegal drugs would be found in apartment four and in the Chevrolet Impala.

Even though Lt. Drewery did not specify in his affidavit the dates on which he observed particular transactions, and while "stale information cannot be used in a probable cause determination," United States v. Frechette, 583 F.3d 374, 377 (6th Cir. 2009), Lt. Drewery's observations were not stale for two reasons. First, Lt. Drewery did state that his observations occurred between October 15 and December 3 — two to fifty-one days before the probable-cause determination. While "drugs are usually sold and consumed in a prompt fashion," id. at 378, the evidence of drug sales two to fifty-one days before is recent enough here to suggest that there may be further evidence of illegality in that place. In United States v. Greene, 250 F.3d 471, 480-81 (6th Cir. 2001), for instance, we held that 23-month-old evidence of drug sales was not stale when paired with information regarding a drug delivery in the prior month. Second, Lt. Drewery's observations of heavy car and foot traffic, repeated transactions, and one particular transaction in which an unknown man from apartment four took out a packet of marijuana from a bigger bag, all suggested that apartment four was home to an ongoing drug business of some size. We have recognized a "general principle that when `the affidavit properly recites facts indicating activity of a protracted and continuous nature, a course of conduct, the passage of time becomes less significant.'" United States v. Spikes, 158 F.3d 913, 924 (6th Cir. 1998) (quoting United States v. Johnson, 461 F.2d 285, 287 (10th Cir. 1972)); see also Greene, 250 F.3d at 481.

It would certainly have been preferable for Lt. Drewery to have indicated the specific dates, but the fact that all of the multiple and repeated activities were observed within a defined period of less than seven weeks just prior to the date of the affidavit was sufficient to support probable cause. Perry argues that the lack of specific dates precludes either a conclusion that the activities were recent, or the existence of a protracted and continuous course of conduct. This attempt to play two ends against the middle is not persuasive in the context of this case. "[T]he function of a staleness test in the search warrant context is not to create an arbitrary time limitation within which discovered facts must be presented to a magistrate." Spikes, 158 F.3d at 923 (quoting United States v. Henson, 848 F.2d 1374, 1382 (6th Cir. 1988)). The relative recency of a set of actions and their relative closeness in time to each other combine to demonstrate probable cause, especially given the limited nature of our review of the probable-cause determination. Such review is limited to "whether the magistrate had a substantial basis for finding that the affidavit established probable cause to believe that the evidence would be found at the place cited," giving "great deference to a magistrate's determination of probable cause." United States v. Brown, 732 F.3d 569, 572-73 (6th Cir. 2013) (quoting Greene, 250 F.3d at 478). On the merits, probable cause exists under the Fourth Amendment "when there is a fair probability, given the totality of the circumstances, that contraband or evidence of a crime will be found in a particular place." Brown, 732 F.3d at 573 (quoting Greene, 250 F.3d at 479) (internal quotation marks omitted).

Also without merit is Perry's argument that the district court relied on information outside Lt. Drewery's affidavit in upholding the probable-cause determination of the Tennessee magistrate. The district court explicitly disavowed reliance on such information. After a federal magistrate judge referred to evidence outside of Lt. Drewery's affidavit without relying on it,2 the district court granted Perry's objection to disregard such evidence and stated: "The Court will limit its factual findings to those described in the affidavit." United States v. Perry, Cr. No. 2:15-cr-20154-JTF, 2016 WL 916430, at *5 (W.D. Tenn. Mar. 10, 2016). The district court then concluded in particular that "there is substantial evidence within the four corners of the affidavit that a continuous and ongoing drug operation was being conducted" in apartment four. Id. (emphasis added).

Probable cause supported the search warrant in this case. The judgment of the district court is affirmed.