(fractional number) ninety-ninth

a cold day in July, a cold day in Hell (the time of occurrence of an event that will never happen)

(informal) Very often

old-style four-wheel rollerskate

(informal) to give someone a piece of one's mind; to tell (someone) some home truths, to say a few choice words to [+ à (someone)]

plural of trèfle à quatre feuilles

(literally) to walk on all fours; walk on all four legs / (idiomatic, baby) to crawl

ninety-nine (cardinal number 99)

plural of patin à quatre roues

ninety-seven