This is in addition to the initial order or trial (if there's a trial)

Example settings:

* No trial, monthly recurring, keep charging until customer cancels (Unlimited-recurring)
Set to 9999

* No trial, 6 total payments in TOTAL
Set to 5
(because the initial order will be 1, plus 5 recurring. So 1 (today) + 5 (Recurring) = 6 Payments in TOTAL

* 30-day trial, only 6 total payments in TOTAL including trial
Set to 5
(because the initial trial will be counted as 1, plus 5 recurring. So 1 (today) + 5 (Recurring) = 6 Payments in TOTAL

* 7-day trial, followed by 6 monthly payments
Set to 6

* 30-day trial followed by 12 payments
Set to 12

* 30-day trial followed by 11 payments
Set to 11