Liddell-Scott-Jones

πλειστάκις (pleistakis) very often ^G:A

πλειστάκις [ᾰ],

adverb, (πλεῖστος) mostly, very often, [LXX+5th c.BC+]—A form πλειστάκι [Refs 1st c.AD+]

_{LSJ Scripture Refs: LXX.Eccl.7.23}