The study was conducted over a period of 10 months.
This is usually conducted over the phone and takes 1-2 hours.
The research work had been conducted over 19 sites since 1998.
He has conducted polls and focus groups in over 30 countries around the world.
Two interviews with the same man, conducted over a single day.
More recently, he has conducted over two thousand additional test cases.
She conducted her sea trials over the next several months.
But research conducted over the last few decades has shown that this is not the case.
Many checks are conducted by post or over the phone.
It was the fourth in a series of operations conducted over the last 11 months.