Linguistics term covering word choice, phrasing, and grammatical patterns. Often used in contexts like 語法研究 (study of usage) or 語法上の誤り (grammatical error).
He is knowledgeable about English grammar and usage.
Sino-Japanese compound of 語 (word, language) and 法 (method, rule). The term was coined in the Meiji period as a translation of Western linguistic concepts such as 'usage' or 'diction'.