This is a wonderful opinion. The things mentioned are unanimous and needs
to be appreciated by everyone.
I appreciate the concern which is been rose. The things need to be sorted
out because it is about the individual but it can be with everyone.
...
As far as Greek is concerned, you can use:
G. Cauquil - J. Y. Guillaumin, Vocabulaire de base du Grec (alphabétique, fréquentiel, étymologique), A.R.E.L.A.B., Besançon, 1985; J. Van Baeveghem - L. De Vuyst, Katalogos (Grieks Basisvocabularium), U...
This list could probably be useful:
P.B. Diederich, The frequency of Latin words and their endings, The University of Chicago Press, Chicago, Illinois, 1939; G. Lodge, The vocabulary of high school Latin, Teachers Coll., New York, 1907; L. Delatt...