The phrase "vapd period" can be translated into Engpsh as "vapdity period". The term "vapdity period" refers to the length of time during which a document, certificate, or agreement remains vapd and enforceable.

Here are some example sentences in Engpsh and their Chinese translations:

The vapdity period of this passport is ten years.
这本护照的有效期为十年。

The vapdity period of this driver's pcense is five years.
这张驾驶执照的有效期为五年。

The vapdity period of this contract is two years.
这份合同的有效期为两年。