The agreed invoicing cadence, such as monthly, quarterly or annually. It describes when invoices are issued, not necessarily how long the customer is committed or how quickly each invoice must be paid.
An example
A two-year subscription costing S$60,000 a year is invoiced quarterly at S$15,000 per quarter. If payment terms are Net 30, each quarterly invoice has its own due date; the commitment still lasts two years.
What to check
Frequency does not establish the commitment length or payment due date. Confirm all three independently.
In practice
Compare the billing schedule with the contract term and service dates. Moving from annual upfront billing to quarterly billing changes cash collection even when the annual subscription amount remains the same.