plan

The total number of billing cycles (invoices) that will be generated in this recurring series. Once all cycles are completed, the series automatically expires. Note: if not set, then the series will be indefinite.

The stand-alone date, in [Internet date and time format](https://tools.ietf.org/html/rfc3339#section-5.6). To represent special legal values, such as a date of birth, you should use dates with no associated time or time-zone data. Whenever possible, use the standard `date_time` type. This regular expression does not validate all dates. For example, February 31 is valid and nothing is known about leap years.

The stand-alone date, in [Internet date and time format](https://tools.ietf.org/html/rfc3339#section-5.6). To represent special legal values, such as a date of birth, you should use dates with no associated time or time-zone data. Whenever possible, use the standard `date_time` type. This regular expression does not validate all dates. For example, February 31 is valid and nothing is known about leap years.

The number of billing cycles (invoices) that have already been generated and sent in this recurring series. This counter increments with each invoice sent and helps track progress toward the total cycles.