1. He has every third day off .

2. He comes here every third day.

3. It has been snowing, roughly every third day.

4. Miss Powel went to town every third day.

5. He comes here every three days(every third day).

6. It has been snowing, roughly every third day, for as long as I've had the flu.

7. Sometimes he ate every third day, sometimes only every fifth or sixth day; so he was always hungry, although he worked day and night.

8. I usually go to my uncle's every three days every third day.