In one of my posts ("demanded" vs. "needed") an answerer said
We say that something is in demand rather than demanded.
Cambridge Dictionary gives this
Good teachers are always in demand (= needed)
Google Ngram shows that "demanded" is a bit more commonly used that "in demand", and of course, "needed" is the most commonly used.
with modifiers, things change, "in great demand" is indeed the most commonly used.
So, "in demand" and "demanded", which would I use?