Acting on stage - working intensely for a short but concentrated period - makes unique demands on you.

Such events usually converge like sand in an hour glass into one concentrated period.

However, people may gain admission for a concentrated period of therapy or for respite.

Here's a scheme that encouraged a lot of people to visit restaurants in very concentrated periods.

But with the 2017 season largely divided into concentrated periods of fourday, 50-over and 20-over games, this will not often be possible.