Billing Profiles are groups for the cadences in which all customers are billed. Billing profiles make it easier to create, send, and track invoices in bulk.
Available cadences:
Monthly
Bimonthly
Quarterly
Every 4 months
Every 6 months
Annually
Under 'Settings', click 'Billing', add 'Billing Cycles' to make the above cadences available when setting up billing profiles (see screenshot).
Note: Only create those that are relevant to your business model.
Then, set up billing profiles by following the directions in the following help article.