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Continue to Chata(n): ✓ three times A week, a hundred miles AN hour ✗ three times *at/in* *a/the* week http://www.mistakesitaliansmake.it/2016/07/07/an-%e2%9c%93-three-times-a-week-a-hundred-miles-an-hour-%e2%9c%97-three-times-at_in-a_the-week/