numeral-classifier compound (e.g. [[一次|一次|yi1 ci4]], [[三|三|san1]][[套|套|tao4]], [[五|五|wu3]][[本|本|ben3]] etc)

A Chinese measure word used to quantify the occurrence, frequency, or duration of an action.

A measure word or classifier in Chinese grammar used primarily to quantify nouns, typically appearing after a number or demonstrative.