wfFrSwSvcUsageStoreTimeStamp 1.3.6.1.4.1.18.3.5.9.6.5.44

Time stamp of last wfFrSwSvcUsageStoreInterval timer expiration or the starting time of the current wfFrSwSvcUsageStoreInterval. This value is number of seconds since midnight Jan. 1, 1976 (GMT).