The play takes place over a period of six weeks.

Let's say the market takes off over a period of weeks or months.

Yeah but I think it's a period of six weeks.

All this is to be done within a period of two weeks.

It was built within a short period of 6 weeks.

And our project, over a period of three weeks, was to create a new dance every day!

They saw each other frequently over a period of six weeks.

The men became ill over a period of 10 weeks.

However, during a period of five weeks, not a single ship was hit.

His depression had been growing over a period of weeks.