Recurring purchase invoice profile - add option "every 30 days"

[alan_mcbrien]

Recurring purchase - Every 30 days

Feature requested Recurring purchase. additional option of “Every 30 days” Typical use case Nearest options currently are “Monthly” or “Every 4 Weeks” How I would expect it to work A phone network supplier billing is recurring “Every 30 Days” This could also be useful on recurring sales invoices.

I started a feature request last September for an option to do recurring purchase invoices every 30 days, but without any success.

Wondering whether there is any CSS code that I can add to an appropriate CSS preset template, but cannot see anything suitable!