None. A decade is a period of 10 year, therefore, in 10 years, you have 1 decade. Mathematically, you could say you have 0.1 or 1/10 of a decade in a year.
Astrampsychus. has written: 'Astrampsychi Oraculorum Dacades CIII' -- subject(s): Religion, Philosophy, Fortune-telling
It can. Chicago has been hit by tornadoes in the past. It has simply been a matter of chance that the city has not taken a major direct hit in recent dacades.
The group known as ABBA has sold an estimated 300 million records which has spanned over three dacades, and continues to sell world wide. Enough said.
How many what in a leap year?
Many year explore.
Months is plural when discussing the number. "How many months are in a year?"
There are many thousands every year
how many litters do hyenas have in a year
thay have many many many
One
365
there are 12months in a year