The Olympics are held every how many years?

4 years

Explanation:

But Tokyo Olympics will be held in 2021 coz of corona

four years

Since then, the Summer and Winter Games are each still held every four years but the Summer Games are celebrated during the first year of an Olympiad and the Winter Games held in the third year.

Explanation:

Why are the Olympics every 4 years?

To respect the ancient origins of the Olympic Games, which were held every four years at Olympia. The four-year interval between the Ancient Games editions was named an “Olympiad”, and was used for dating purposes at the time: time was counted in Olympiads rather than years.