I don't recall ever hearing a conductor or anyone for that matter use the word "divisi" or divisions etc when dealing with any section except strings. Flute 1, Flute 2 etc. Maybe in band, I really don't know.I thought they were called divisions when talking about brass and woodwinds.
"Celli are divisi at measure 46".
"Trumpets are divisi at measure 46".
Never heard the latter before.