ἐφ' ὅσον αὐτοῦ ἡ ὑπόστασις τῶν χρόνων ὑπῆρχεν → as long as his store of years lasted
prōsectum: i, n., v. proseco.
prōsectum, v. prosecta : Varro L. 5, 110.