"nook and cranny"의 정의 및 의미

What is the origin of the idiom "nook and cranny" and when to use it?

The idiom "nook and cranny" originated from the literal architectural features of buildings, specifically referring to small, hidden spaces or corners. A "nook" refers to a small, secluded area or recess, while a "cranny" denotes a narrow opening or crevice. The phrase is used to emphasize the thorough exploration of every nook and cranny, suggesting a meticulous search or examination of even the tiniest and most concealed areas.