It depends of the age, there isn't a specific time that it has to last.
An age is not determined by a finite quantity of time, but when a change happens. For example, the ice age lasted for as long as the enviroment was cold, but it doesnt mean the next age ( the stone age) will last for the same amount of time.
for 32 years :)
20000 years
5,000 years ago.
1
30 years of age.
If You Mean Years By Age, Then 18.
20,00 years.
500 years
about 120 years ago
9075.6
Many tens of thousands of years.
I believe he died at the age of 75 years old.