Significance of BillingNumberOfPeriods field in OM Payload

Summary:

When I pass a value in "BillingNumberOfPeriods" field in the Order Management API for creating a subscription, Subscription Management ignores the value passed in this field and creates the billing schedule based on the term ("ServiceDuration" field) and billing frequency ("PeriodicityCode" field)

Does the "BillingNumberOfPeriods" have any significance in the OM payload when creating subscriptions in SMC?

It is a mandatory field in the payload.

Content (please ensure you mask any confidential information):

In attached payload I have passed service duration as 700 days, Billingnumberofperiods as 1000 and PeriodicityCode as YEAR. In SMC it created 2 bill lines one for each year, so Billingnumberofperiods does not have any significance.