Usage
来自Big Physics
Middle English (in the sense ‘customary practice’): from Old French, from us ‘a use’ (see use).
wiktionary
From Middle English usage, from Anglo-Norman and Old French usage.
etymonline
usage (n.)
c. 1300, "established practice, custom," from Anglo-French and Old French usage "custom, habit, experience; taxes levied," from us, from Latin usus "use, custom" (see use (v.)). From late 14c. as "service, use, act of using something."
