What event happens every two years?

every two years: biennial games.

How do you say every two years?

Biennale or Biennale: Biennale means once every two years.

What happens every 3 years?

triennial (every three years), which is sometimes confused with triennial (usually every four months). every two years (every two years). semi-annually (twice a year).

Is it twice a year, semi-annually or semester?

Bi-annual means twice a year, also biannual, while bi-annual means every two years.

What is the term for all three years?

1: the triennial or triennial congress.

What do you call something that happens every 4 years?

every four years: a festival held every four years. of or for a four-year period: a four-year period.

What do you call a period of 3 years?

triennial (every three years), which is sometimes confused with triennial (usually every four months). every two years (every two years).