usage
/ˈju:sɪdʒ, ˈju:zɪdʒ; `jusɪdʒ, `juzɪdʒ/ n
1 [U] manner of using sth; treatment 用法; 处理; 对待
The tractor had been damaged by rough usage. 这辆拖拉机因使用不经心而损坏了.
2 [U, C] habitual or customary practice, esp in the way words are used 习惯; 惯例; （尤指）词语惯用法
English grammar and usage 英语的语法和惯用法
Languages develop continually through usage. 语言在使用中不断发展.
It's not a word in common usage. 这个词不是个普通常用词.
A dictionary helps one to distinguish correct and incorrect usages. 词典可用以辨识遣词造句的正误.