Some of these countries have been working together for two months.

We have worked hard together for the last 18 months.

This part of the site won't be working for at least four months.

I then worked there for 15 months which was also a great experience.

The government told workers that they would only have to work for six months of every year.

No one could work a hundred hours a week for more than six months.

It worked for only 18 months before the line was closed.

I have worked on it for three months and then it's gone.

"We worked very hard for months until the first issue was published."

I had worked very hard for months to pass it.