It is a triennial event. A triennial event happens three times a year.
A triennial event happens every three years.
Something that happens every six years is sexennial.
Something that happens every three years is a triennialevent.
Biennial or biannual can refer to something which happens every two years.
Semicentennial
the world cup ( I think) happens every 3 years or 4 years?
The phrase "once every 3 years" can be expressed as "triennial." This term refers to an event or occurrence that happens every three years. Alternatively, you could also say "every three years" for clarity.
Your mom happens every two years. U.S. Senators are elected to serve terms of 6 years and terms are staggered so that about 1/3 of the Senate seats are up for election every two years.
A triennial event happens every three years.
Something that happens every six years is sexennial.
Something that happens every three years is a triennialevent.
Oh, dude, you mean besides my existential crisis? Ha, just kidding. The Olympics happen every 4 years, so I guess you're looking for something that happens more often. How about the World Choir Games? They happen every 2-3 years, so there you go, a fun fact for your next trivia night.
Something that happens once a century.
not a total eclipse, a partial eclipse occurs.
As far as I know, nothing special happens every 100,000 years. A full precession cycle takes about 26,000 years.
Quinquennial = something that happens every 5 years. Lustral = also something that happens every 5 years or we could invent: semi-Decennial: where semi is half and Deccennial happens every 10 years.
It happens every 200 years.