World championships are held every few years.

Two years, four years, one year. A world championship is one of a series of finals between the winners of a large group of competitions around the world. Tournaments are open to people who have reached a certain level, and the number of players in each country is limited. Football World Cup and Basketball World Championships are held every four years; The Table Tennis World Championships and Taekwondo World Championships are held every two years. Snooker World Championships and World Gymnastics Championships are held once a year.