At first, he couldn't stay away for more than a couple of weeks. (realtormag.realtor.org)
I was wondering why it was taking more than a couple of weeks for my son to stay in his bed? (marytamborski.com)
A crash diet focuses on nutritional restriction (except from water) and not intended to last more than a couple of weeks due to its potential side effects. (foodpyramid.com)