You can see how a customer has used their membership across billing intervals from either the Packages or Customers pages.

From Packages, click on the membership, then Package customers, click on the customer from the Live or Expired list and then select the booking or purchase detail you wish to view from the Usage history drop-down menu.

From Customers, click on the customers name, Purchase history, then select Packages, Live or Expired filter and click on the relevant membership. Then select the booking or purchase detail you wish to view from the Usage history drop-down menu.