What is the origin of the idiom "treasure trove" and when to use it?
The idiom "treasure trove" originated from the literal meaning of a treasure trove, which refers to a hidden or valuable collection of objects or wealth that has been discovered or unearthed. It is used to signify a valuable or significant discovery, often unexpected, that is considered a source of great fortune or delight.
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treasure of unknown ownership found hidden (usually in the earth)