What is something that happens every 2 years?

Related questions

1. Does onion contain Sulphur?
2. Is biweekly every 2 weeks or twice a week?
3. Is semi annual every 6 months?
4. Do perennials live forever?
5. What does biennial plant mean?
6. Is semi annual and biannual the same?
7. What is once every 2 years called?
8. How do you say every other year?
9. Is biannual every 2 years?
10. What is 6 months anniversary called?

Tags

1. #their
2. #years
3. #lasting
4. #every
5. #second
6. #herbs
7. #flower
8. #plant
9. #definition
10. #dying
11. #fruiting
12. #continuing
13. #biennial
14. #vegetatively
15. #during
16. #first
17. #occurring
18. #celebration
19. #growing
20. #specifically