Frequently used verbs in Greek = Συνήθη ρήματα της ελληνικής γλώσσας
Most common Greek verbs = Τα πιο συνήθη/κοινά ελληνικά ρήματα
Most used 1000 Greek verbs = Τα 1000 περισσότερο/πιο χρησιμοποιημένα ελληνικά ρήματα
There might be better ways to say this, but these just came in my mind. Maybe you should wait for another opinion as well. Hope I helped you.
Hi. It will be understood off course, however it's not the more precise way to express it. I find that "τα πιο κοινά ρήματα της Ελληνικής" is a pretty accurate translation of "the most common Greek verbs". Maybe the most grammatically correct expression to use would be to say "Τα πιο συχνά χρησιμοποιούμενα ρήματα της Ελληνικής".