γυμνασμός

From LSJ

μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs

Source

Spanish (DGE)

-οῦ, ὁ ejercicio τῆς χάριτος Mac.Aeg.Serm.B 13.2.5.