frequency

n.屡次，频繁；频率，周率；发生次数

French, French bean, French Canadian, French chalk, French dressing, French fry, French horn, French letter, French loaf (also French bread), French polish, French seam, French window (US also French door), Frenchman, Frenchwoman, frenetic, frenetic (also phrenetic), frenetically, frenzied, frenziedly, frenzy, frequent, frequently, fresco, fresh, fresh-, freshen, freshener, fresher, freshly, freshman, freshness, freshwater, fret, fretful, fretfully, fretsaw, fretwork, Freudian, Freudian slip, Fri,