The frequently purchased items module is a handy way for customers to quickly find those items that they may want to order again. How it works is simple; so let's dive in to see the details.
What makes an item appear in the Frequently Purchased module
This module will list out any product that has been purchased in the last 6 months. The order of the items isn't based on how many times you purchased them.
Thus, if you login for the first time and make a single purchase that product will appear in the Frequently Purchased items. This way you can easily find items regardless of whether you purchase them often or just every once in a while.