“Comprised of” has been used for centuries in English. Some editors still prefer “composed of,” but the phrase is well established.

Champagne is first a region in France. Only sparkling wine made there under strict rules can legally use the name Champagne.

“Done to a turn” first referred to meat roasted perfectly by careful turning. Now it can also mean done with exact skill or precision.

This phrase started with literal pegs used to mark rank. Lowering a peg lowered status, which led to today’s figurative meaning.