Can we create plan term of 4 weeks for Accrual Plan

Summary:

We have accounting period of 4 weeks and requirement is to carry forward only 37 hours from 1 accounting period to another. However Accrual plan has only option to define yearly plan term (calendar year or anniversary year).

Content (required):

As per statuary requirement of UK, Flexi Leave accounting period is of 4 weeks. It is created as accrual plan. Employee can carry forward 37 hours from one accounting period to another.

However, I see just anniversary year and calendar year plan term which will evaluate carryover at the end of 12 months. We want plan to evaluate carryover at the end of each 4 weeks accounting period.