Lewis Short
(adjective) : frĕquentātīvus, a, um, frequento, in the later gramm.
* That denotes the repetition of an act, frequentative: verba,Gell. 9, 6, 1; Diom. 336 P.: verborum qualitas,id. 335 P.—Adv.: frĕquentātīve, frequentatively, Fest. s. v. verberitare, p. 379 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary