Some things that happen once every four years include: - Leap Years - US Elections - The Olympics
Letter " m " ^_^ - > christian
More like every 28 years, I think.
You have the world cup, the U.S president is elected, the Olympics are held , and so is the Euro cup. This all happens every four years.
The letter "Y."
Once every century?
vicennial: happening once every 20 years
A synonym for every five years is quinquennial: as an adjective describes something that happens every five years or that lasts for five years; the noun means the fifth anniversary or a period of five years.
Jupiter orbits the Sun once every 11.9 Earth years, Saturn once every 29.5 Earth years, Uranus once every 84 Earth years, and Neptune once every 165 Earth years.
Biennial is once every two years. Biannual is twice every year.
Every four years.
Every ten years=once a decade
An event that occurs once every three years.
Only once or twice in your life time, its not so, you need a booster shot once every 10 years superfuga
Some things that happen once every four years include: - Leap Years - US Elections - The Olympics
The letter 'M'.
Biannual describes something that occurs twice a year, once every half year.