frequentadj.频繁的;经常的vt.常到;常去
frequent sequenee频繁序列
frequent vomiting胃反
frequent visiting经常性会见
frequent episodes频繁情节
frequent traveler频繁的旅行者
frequent cleaning频繁清洗
frequent journeys惯常的旅行
frequent subtrees频繁子树
frequent term set频繁词集
Frequent items set频繁项集