period

The duration of the resource purchase. The unit is specified by the PeriodUnit. The parameter payment_type takes effect only when the value is Subscription and is required. Once the DedicatedHostId is specified, the value cannot exceed the subscription duration of the dedicated host. When period_unit = Year, Period values: {"1", "2", "3"}. When period_unit = Month, Period values: {"1", "2", "3", "4", "5", "6", "7", "8", "9"}.