They held with Olympics that is in every fouth year
both are/were held every 4 years, or as the ancient Greeks called it, every olympiad
ancient Olympics were held every 4 years
they are held every 4 years
The Olympics were held every four years, this time span was called an Olympiad.
The Olympics are held once every four years.
They do it every 4 years.
Every four years.
every 4 years after the Olympics
Every 4 years.