φοίτησις

εως, ἡ
A. regular or repeated going, mostly in pl., αἱ ἐπὶ τὰς θύρας φ. X. HG 1.6.7; τῶν εἰς τοὺς γάμους καὶ γενέθλια φοιτήσεων resortings to marriages . . , Pl. Lg. 784d.
2. going to school, ib.764d (pl.): hence ἐκ φοιτήσεώς τινος of his school, Paus. 5.17.4.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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