Frequency Rules for Voluntary Deduction

I have a weekly (W) and biweekly (BW) payroll. For the biweekly payroll, the deduction is always taken on the 1st pay period of the month. The weekly payroll is more tricky. For the weekly payroll, I need to configure a frequency rule to process a monthly deduction on the 1st bi-weekly pay period of the month. How do I achieve this?

For example, some months:

n/a W1

BW1 W2 → Deduction Taken for both BW and W payrolls

n/a W3

BW2 W4

Other months:

BW1 W1 → Deduction Taken for both BW and W payrolls

n/a W2

BW2 W3