What's the difference between i.e. and e.g.?
1540s, from Middle French defraier (15c.), from de- "out" (see de-) + fraier "spend," from Old French frais "costs, damages caused by breakage," from Latin fractum, neuter past participle of frangere "to break" (see fraction). Alternative etymology traces second element to Old High German fridu "peace," via Vulgar Latin *fredum "fine, cost."