Estimates of its age vary from 2 to 4 billion years.

So her children's ages at training varied from 2 to 4 years old.

Each object is the only one of its kind and varies from 5 to 200 years in age.

Numbers in attendance varies from year to but average over 500 people.

This period varies from 10 to 30 years, or occasionally until age 95.

Guidelines on frequency vary from every three to five years.

The limitation period varies from three to ten years depending on the country.

The game and the rules vary from year to year.

The rules for the final have varied from year to year.

Lives for personal property vary from 3 years to 20 years.