Usage: 7 forms in 57 verses
Form Translated As     In Verse(s)
ενιαύσιον of a year LXX.Exod.12.5LXX.Lev.9.3LXX.Lev.12.6LXX.Lev.14.10LXX.Lev.23.12LXX.Num.6.12LXX.Num.6.14LXX.Num.7.15LXX.Num.7.21LXX.Num.7.27LXX.Num.7.33LXX.Num.7.39LXX.Num.7.45LXX.Num.7.51LXX.Num.7.57LXX.Num.7.63LXX.Num.7.69LXX.Num.7.75LXX.Num.7.81LXX.Num.8.8LXX.Ezek.46.13
ενιαύσιοι of a year LXX.Num.7.87LXX.Num.7.88
ενιαυσιασ of a year LXX.Num.7.17
ενιαυσίουσ of a year LXX.Exod.29.38LXX.Lev.14.10LXX.Lev.23.18LXX.Lev.23.19LXX.Num.28.3LXX.Num.28.9LXX.Num.28.11LXX.Num.28.19LXX.Num.28.27LXX.Num.29.2LXX.Num.29.8LXX.Num.29.13LXX.Num.29.17LXX.Num.29.20LXX.Num.29.23LXX.Num.29.26LXX.Num.29.29LXX.Num.29.32LXX.Num.29.36
ενιαυσίοισ of a year LXX.Mic.6.6
ενιαυσίασ of a year LXX.Num.7.23LXX.Num.7.29LXX.Num.7.35LXX.Num.7.41LXX.Num.7.47LXX.Num.7.53LXX.Num.7.59LXX.Num.7.65LXX.Num.7.71LXX.Num.7.77LXX.Num.7.83
ενιαυσίαν of a year LXX.Num.6.14LXX.Num.15.27

Liddell-Scott-Jones

ἐνιαύσιος (eniausios) of a year G:A

ἐνιαύσιος-αύσιος, α, ον,

[Refs 5th c.BC+]; also ος, ον [Refs 5th c.BC+]: (ἐνιαυτός):— of a year, one year old, σῦς [Refs 8th c.BC+]

__II annual, [Refs 8th c.BC+]: neuter plural as adverb, [Refs 8th c.BC+] adverb -ίως[Refs 4th c.BC+]
__III lasting a year, [Refs 5th c.BC+]; . φυγή a year's exile, [Refs 5th c.BC+]; ὁδός X.[same place]; κἀνιαύσιος βεβώς gone, absent for a year, [Refs 5th c.BC+]