Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
αριθμητοί are counted LXX.Job.14.5
αριθμητά are counted LXX.Job.15.20
counted LXX.Job.16.22

Liddell-Scott-Jones

ἀριθμητός (arithmētos) counted G:A

ἀριθμητός-ητός, , όν,

that can be counted, οὐκ .[Refs 5th c.BC+]; opposed to μετρητόν, [Refs]

__2 easily numbered, few in number, ἀριθμητόςητοὺς ἀπὸ πολλῶν[Refs 3rd c.BC+]
__3 οὐκ . of no account, [Refs]