The word for every twenty years is "score."
It used to be called a score. So four score and 7 years would be 87 years.
In Swahili, "kumi ishirini" means twenty. It is a combination of the words "kumi" which means ten, and "ishirini" which means twenty.
Thirty-two and twenty-six.
The correct spelling for twenty eight in Portuguese is "vinte e oito."
You may be thinking of a "score", as in Lincoln's Gettysburg Address ('Four score and seven years ago' means 87 years ago.)It is also called two decades.
you could say two score...it's old school, but a score is twenty years.
No, we have phases of drought, but it isn't every 20 years.
every twenty years?
bidecadal
Every twenty years
a score, as in "Four score and seven years..."
Quadrenial
The word Biennial means Every two years
Every decade
It used to be called a score. So four score and 7 years would be 87 years.
Sextennial means "Recurring every six years."
Something that happens every three years is a triennialevent.