How much time is in between NHL periods?

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Tags

1. #minutes
2. #nationally
3. #shall
4. #resumed
5. #length
6. #period
7. #televised
8. #following
9. #fifteen
10. #seventeen
11. #league
12. #promptly
13. #completion
14. #intermission
15. #seconds
16. #designated
17. #preceding
18. #thirty
19. #expiration
20. #games