Where is the rate of change in a price index over the previous period.

By 1590, Spain's population was far greater than what it had been in any previous period.

The company said that the first six months of the year 'have seen more new business than during any previous period'.

In no previous period had a single decade brought so many changes for the university as the 1960s.

The report said that sales for the first two weeks of October were down 1.9 percent from the previous period.

They had taken one shot only once in the 243 previous periods played this season.

This is up by a year on the previous period, when the gap stood at 12.5 years.

It is a financial summary of what happened in a previous period.

The decline came after a small increase in the previous period.

The truth is that our research budget will increase by 60% for the next seven years compared with the previous period.