trial period
test period

Why would most users even visit this home page during the test period?

The test period, originally scheduled to end in 2009, was later extended to 2014.

During the test period, some 110 people a day paid the 25-cent fee to use the toilets - about 40,000 in all.

For the test period, a third controller will operate the light system.

The test period is expected to last about six months.

A specific question has been asked as to why only five languages will be used at the beginning of the test period.

Despite a long test period in several regional lines, the vehicle never came into regular service.

There were just under 10 minutes left and Calhoun's critical test period was over.

It was "not unreasonable" to start the 90-day test period right away, he said.

After a test period that ended last November, the center added a second helicopter to the one in use since 1992.