Usage is the way in which words are actually used in particular contexts, especially with regard to their meanings. (词在特定语境中的) 使用
noun [具体名词] (词语的)用法;使用,用量;(尤指形成权利,义务,标准等的)常规做法,惯例;<正式>虐待,不公待遇
He was a stickler for the correct usage of English. 他是一个坚持英语的正确使用的人。