Commonwealth Games
The Olympics.
The Olympics is know as the biggest sporting event in the world and is held every four years in a different country. The gymnaestrada is also held every four years in a different country around the world. There are around 12,000 athletes in the Olympics but there are over 20,000 gymnasts in the gymnaestrada making it the biggest sporting event in the world for participants.
Sporting contests were held in Olympia,the sanctuary in the W.Peloponnese,ancient Greece as a sacred truce every four years in Greece.
The FIFA World Cup because it lasts longer than the Olympics etc. and it draws a bigger crowd
Leap year
When used as an adjective, it means occurring every, or last for, four years. As a noun, it references an event that occurs every four years. (see: http://dictionary.reference.com/browse/quadrennially )
The Olympics is the biggest sporting event in the world and occurs every four years. this year it was held in Beijing. Nearly ever sport is performed at the Olympics, most famous and publisiced are Swimming, Athletics, Gymnastics, Rowing, Sailing and Cycling.
If you mean the number of team members, It would be the USA Summer Olympic Team every four years.
UEFA Champions League final is the most watched annual sporting event in the world. The World Cup occurs every four years and is the most watched sporting event in the world.
The Olympics are held once every fourth year.
The Olympic Games were held every four years from 776 BCE at the temple of Zeus at Olympia in southern Greece as a celebration for the god. It was discontinued a thousand years later under Roman rule when the celebration had become corrupted. It was revived in modern times in 1896 as a purely sporting event.
I assume you mean every four years and yes it is held every four years