leger line vs ledger line

leger line and ledger line both are nouns.

Word	Noun	Adjective	Verb	Adverb
leger line	Yes	No	No	No
ledger line	Yes	No	No	No

As nouns, leger line and ledger line are synonyms defined as:

leger line and ledger line: a short line; a notation for extending the range above or below the staff

leger line (noun)	ledger line (noun)
a short line; a notation for extending the range above or below the staff	a short line; a notation for extending the range above or below the staff