Sentence examples for every third from inspiring English sources

"every third" is a correct and commonly used phrase in written English.
It usually refers to something that occurs or is chosen at regular intervals of every three items. Example: "I marked every third page of the book with a sticky note to help me study for the exam." This means that out of every three pages, one was marked with a sticky note. Another example: "The company holds a company-wide meeting every third Friday of the month." This means that the meeting occurs every third Friday, or every third occurrence of Friday within a month.