planInformation. billingPeriod.length {#plan-info-billing-period-length}
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The plan billing period length.  
The billing period length and unit must be included in your plan request. For example, to bill once a month, set the length to `1` and the unit to `M`. To bill once every seven days, set the length to `7` and the unit to `D`.

Specifications {#plan-info-billing-period-length_Specifications}
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* **Data Type:** String
* **Data Length:** 2

Mapping Information {#plan-info-billing-period-length_Mapping}
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* **REST API Field:** planInformation.billingPeriod.length
* **SCMP API Field:** No corresponding field.
* **Simple Order API Field:** No corresponding field.