Total invoice times for this subscription, must > 1.
The value of "times" must not exceed a maximum period of 5 years. In other words, if interval_unit = year, then times <= 5; if interval_unit = month, then times <= 12 * 5.

The number of intervals between invoices. For example, interval=month and interval_count=3 bills every 3 months.
The entire cycle must not exceed five years, i.e., interval_count times ≤ maxTimesByIntervalUnit (which varies depending on the interval_unit: day: 3655=1825, month: 125=60, quarter: 45=20, year: 5). For example, for a monthly interval, the maximum value must not exceed 60.