成ㄔㄥˊchéng千ㄑㄧㄢqiān成ㄔㄥˊchéng萬ㄨㄢˋwàn

  1. 形容數量很多。如：「食物的殘渣引來成千成萬的螞蟻。」也作「成千累萬」。反寥寥無幾

客成千成萬
英lit. by the thousands and tens of thousands (idiom)​; untold numbers, innumerable, thousands upon thousands
德Tausende und Abertausende