This period of study proved very useful later in life.

After an uneventful first half the second period proved to be a better spectacle.

Another important period for Đorđević, the 2006-2007 season, would prove record breaking.

The 10-week period of clinical practice proved to be invaluable.

But in the end, she said, the 90-day period proved to be too little too late.

The initial period of the resulting war proved disastrous for the Soviet military.

The period 1635-1675 proved to be the most successful mission period.

The period at the cottage would prove important in the development of the band.

The period between 1642 and 1660 proved an aberration in British history.

But researchers found that almost any period between two months and a year proved equally profitable over the long term.