Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
οικέτισ a female domestic servant LXX.Prov.30.23
is a domestic servant LXX.Lev.19.20
οικέτιν as a domestic servant LXX.Exod.21.7

Liddell-Scott-Jones

οἰκέτις (oiketis) a female domestic servant G:N-F

οἰκέτις-ῐς, ῐδος, ,

feminine of οἰκέτης, [Refs 5th c.BC+] “Aër.” 21, [LXX+5th c.BC+]

__II housewife, [Refs 3rd c.BC+]

LSJ Scripture Refs: LXX.Exod.21.7