Era or epoch

Usage examples of timespan.

In case you aren't familiar with these wonderfully risky instruments, a call is a piece of paper that gives you the right to buy a stock at a fixed price over a future timespan.

The large numbers proverbially furnished by astronomy, and the large timespans characteristic of geology, combine to turn topsy-turvy our everyday estimates of what is expected and what is miraculous.

Here, even though the timespans were measured in the millions of years, they could clearly see the enormous power of the planet, and the virtual irrelevancy of the human lives on its surface.