Usage: 3 forms in 8 verses
Form Translated As     In Verse(s)
μακρότητοσ their duration LXX.Eccl.8.12
μακρότητα duration LXX.Ps.21.4 • LXX.Ps.23.6 • LXX.Ps.93.5 • LXX.Lam.5.20
with duration LXX.Ps.91.16
μακρότησ a duration LXX.Dan.7.12
duration LXX.Deut.30.20

Liddell-Scott-Jones

μακρότης (makrotēs) duration G:N-M

μακρότης-της, ητος, ἡ,

length, τῶν ἡμερῶν [LXX+1st c.BC+]

LSJ Scripture Refs: LXX.Deut.30.20