Usage: 2 forms in 5 verses
Form Translated As     In Verse(s)
διαβούλια deliberations LXX.Ezek.11.5
his deliberations LXX.Hos.4.9
their deliberations LXX.Hos.5.4LXX.Hos.7.2
διαβουλίοισ deliberations LXX.Ps.10.2

Liddell-Scott-Jones

διαβούλιον (diaboulion) deliberation G:N-N

διαβούλιον-ιον, τό,

debate, deliberation,[LXX+2nd c.BC+]

__II resolution, decree, [Refs]
__III meeting for debate, [Refs 1st c.BC+]