The Olympic Games is held every four years, the Winter Olympics is held every four years, and the World Championships are held every four years. The World Championships are held every four years, and the only event is the World Athletics Championships.

This is the kind held in China this time.

There are other events, as well as the world series.

Olympic Games 08

12

16

20

24

28

32

And so on.

Winter Olympics 10

14

18

22

26

30

And so on.

World championships 1 1

15

19

23

27

3 1

And so on.

But there are many kinds of world champions.

What was held in China this time was

World track and field championships

Once every four years.

Other events, such as basketball, the World Championships are held every two years.

And I like billiards.

tennis

Badminton has a competition every year.