Usage: 4 forms in 9 verses
Form Translated As     In Verse(s)
δίφρουσ chair LXX.Judg.3.24
δίφρου a chair LXX.Prov.9.14
chair LXX.Deut.17.18LXX.1Sam.1.9LXX.1Sam.4.18
his chair LXX.1Sam.4.13
δίφροσ chair LXX.Job.29.7
δίφρον a chair LXX.2Kgs.4.10
chair LXX.1Sam.28.23

Liddell-Scott-Jones

δίφρος (diphros) a chair G:N-M

δίφρος, ,

irregular plural δίφρα, τά, [Refs 3rd c.BC+]:— chariot-board, on which two could stand, the driver (ἡνίοχος) and the combatant (παραιβάτης), [Refs 8th c.BC+]

__2 chariot, [Refs 8th c.BC+]; of the Sun's chariot, [Refs 5th c.BC+]; travelling-car, [Refs 8th c.BC+]; litter, δ. κατάστεγος [Refs 2nd c.AD+]
__II seat, couch, stool, [Refs 8th c.BC+]; = Latin sella curulis, [Refs 2nd c.BC+]; judge's seat of office, [LXX]; royal throne, [Refs 1st c.AD+]; night-stool, [Refs 2nd c.AD+]

LSJ Scripture Refs: LXX.1Kgs.1.9