ἐφ' ὅσον αὐτοῦ ἡ ὑπόστασις τῶν χρόνων ὑπῆρχεν → as long as his store of years lasted
pĕrennē: adv., v. perennis.
pĕrennĕ,¹⁶ n. pris advt (perennis), perpétuellement : Pall. 12, 15, 1 || durant l’année : Col. Rust. 12, 18.
ἀείζωος, ἀείφυλλος, ἀειναής, ἀγήραος, ἀειθαλής, ἀείφρουρος