Accrual should happen for period employee was active

We have business requirement where Seasonal employees are there for 6 months, the employees are enrolled to seasonal sick leave plan. Plan is front loaded accrual plan with repeating period as yearly and accrual rate 136. Now the customer ask is seasonal employee are getting accrual even for period they are not active(seasonal employee active for 6 months eg. Nov-Apr).The accrual should only happen for the period employee is active.

Can anyone please help how can we acheive this scenario. is it possible to accrue absence accruals for a specific month / time period?

Any help is appreciated!

Thank you in advance.