1. An article of manufacture comprising: a storage medium; and a plurality of executable instructions stored on the storage medium that, when executed, direct a device to convert a location history to a stochastic model of the location history by applying at least one recurring time period to the location history, the recurring time period being divided into a number of time intervals, the stochastic model comprising a multi-dimensional matrix that includes multiple entries each corresponding to a combination of one of the time intervals and one of multiple locations, each entry including at least one probability that an object is present at the corresponding one of the locations during the one of the time intervals, the probability being calculated by dividing a total number of times that the location history shows the object as being at the corresponding one of the multiple locations during the corresponding one of the time intervals by a total number of recurrences of the time period.