frequentative (n.)youdaoicibaDictYouDict[frequentative 词源字典]
"verb which expresses repetition of action," 1520s, from French fréquentatif, from Late Latin frequentativus "serving to denote the repetition of an act," from Latin frequentat-, past participle stem of frequentare "visit regularly; do frequently, repeat," from frequentem (see frequent (adj.)).[frequentative etymology, frequentative origin, 英语词源]