It used to be called a score. So four score and 7 years would be 87 years.
The word for every twenty years is "score."
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 say "I am (twenty one, thirty two) years old" in Yoruba language of the Western African origin as "Omo (ogun odun lekan,ogun odun lemeji) ni mi".
the occasion which is 100 years after a given event.
An event occurring every two years is referred to as a biennial event. This pattern indicates that the event happens once every two years.
The word for every twenty years is "score."
No, we have phases of drought, but it isn't every 20 years.
Every twenty years
every twenty years?
bidecadal
Quadrenial
20 years=1 score
Twenty years is a score, as in "Fourscore and seven years ago..." Fourscore and seven equals 87.
Two decades is twenty years. You can also call it a score.
Month
One's girlfriend.
A century.