ćwierćwiecze

He'd known her such a short time, less than a quarter of a century.

I know I'm almost a quarter of a century older than you are.

A quarter of a century ago, the figure was only 3.

For the first time in almost a quarter of a century they would be together.

The record stood for nearly a quarter of a century.

A quarter of a century later, the young man is long gone.

The matter then was left alone for quarter of a century.

I've got one quarter of the eight century to look after.

The project took a quarter of a century to complete.

Certainly over the last quarter of a century it has changed quite a lot.