The district underwent two major boundary changes over its existence.

I have started to adapt, to some degree, to the change that has come over my existence.

Over its existence, the bridge has been the site of at least one suicide a year (police records are incomplete).

It seems as if he would invite the monkey to ponder over himself and his existence.

The university has undergone a number of changes in name (and mission) over its relatively short existence.

The taking of tea was just a mechanical action, to cover over her existence.

The program ended in 1964, having trained and graduated almost 400 nurses over its existence.

Over its existence, the rural district lost territory to new urban districts.

The boundaries formed in the 12th century did not change substantially over the county's existence.

Over its existence, the show has changed very little from season to season.