They can last for months, weeks or just a few hours.

They may last for weeks or months and usually go away on their own.

These can last for up to several months at a time.

In some cases, these can last for more than 6 months.

Season 4 is also expected to last for two months.

This period of training would often last for several months.

It can last for months, years, or even the rest of their lives.

Without good treatment, it can last for months or even years.

He said their mission would last for four and a half months.

I had enough of my own personal affairs to last for months.