Gu-Hoon Kwon master piece This is a mistyping. com/d/word/master-piece ), so it could have been two words only much earlier than that.
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Gu-Hoon Kwonmaster pieceThis is a mistyping. In 1828, the word was hyphenated ( http://1828.mshaffer.com/d/word/master-piece ), so it could have been two words only much earlier than that.