τετράμηνον

From LSJ

Οὕτως γὰρ ἠγάπησεν ὁ Θεὸς τὸν κόσμον, ὥστε τὸν Υἱὸν τὸν μονογενῆ ἔδωκεν, ἵνα πᾶς ὁ πιστεύων εἰς Αὐτὸν μὴ ἀπόληται ἀλλ᾽ ἔχῃ ζωὴν αἰώνιον → For God so loved the world that he gave his only begotten Son that whosoever believeth in him should not perish but have everlasting life (John 3:16)

Source

English (Strong)

neuter of a compound of τέσσαρες and μήν; a four months' space: four months.

Russian (Dvoretsky)

τετράμηνον: (ᾰ) adv. в течение четырех месяцев Arst.