Is "greedy for" really the best Duo can come up with? I don't think I've ever heard that said, or seen it written. I imagine concupiscit is the root of concupiscence so I might suggest desires or covets. Lusts after might be a bit strong, but we might go with drools over? What do you think?
While as a non native speaker I understand greedy for, I have seemingly never registered covet in my life (I would also have understood desire and hanker) so should it not only be in the database but the main solution if it is the much better translation? And at least show up as a third (or first) tooltip?