Usage: 2 forms in 18 verses
Form Translated As     In Verse(s)
πυρείον censer LXX.Exod.27.3LXX.Exod.38.3LXX.Lev.16.12LXX.Num.16.46
his censer LXX.Lev.10.1LXX.Num.16.17LXX.Num.16.17LXX.Num.16.17
his own censer LXX.Num.16.18
πυρεία censers LXX.Num.4.14LXX.Num.16.6LXX.Num.16.17LXX.Num.16.37LXX.Num.16.38LXX.Num.16.39LXX.2Kgs.25.15LXX.2Chr.4.11LXX.2Chr.4.21

Liddell-Scott-Jones

πυρεῖον (pureion) a censer G:N-N

πυρεῖον,

Ionic dialect πυρ-ϊον, τό, mostly in plural, firesticks, [Refs 5th c.BC+]; πυοεῖά τε χερσὶν ἐνώμων [Refs 3rd c.BC+]; the stationary piece was called ἐσχάρα, the drill τρύπανον, [Refs 4th c.BC+]

__II singular, earthen pan for coals (= θυμιατήριον, [LXX+5th c.AD+]

LSJ Scripture Refs: LXX.Exod.27.3LXX.2Chr.4.11