depends what for!
a score is 20 years, so four score and ten years ago would be 90 years
Every ten years=once a decade
90 years
Liverpool and Berlin hosts a passion play every ten years.
a census is every 10 years
decennial Occurring every ten (10) years. Also tenth anniversary
They are cut down every ten years to rejuvenate the forest.
It is a decennial.
A decade.
Every ten years, the Jesse and Miles go to the spring and see their parents.
Every ten years
Every ten years in the Census.