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counter for buildings (esp. houses)
suffix for a pen name, stage name, etc.
この通りには三軒のレストランがある。
There are three restaurants on this street.
引っ越し先の軒数を数えて回った。
I went around counting the number of houses at the new location.
近所に数軒の空き家ができてしまった。
Several empty houses have appeared in the neighborhood.