He worked on it in stages over a four-year period.

The team won a total of 18 races during the four-year period.

In a four-year period until 2012 the district lost 1,400 students.

North Korea says that 220,000 people died in the four-year period.

I was the one at school with the four-year period.

She will serve in this office for a four-year period.

In 1968, changes of use but not physical development started after 1963 were excluded from this four-year period.

The 1984 Act raised revenues by $50.7 billion over a four-year period.

As a result, the Commission agreed to a four-year period.

This four-year period should not be an issue, because no one is calling that into question anyway.