They could have a char once a fortnight for a scrub-down and the heavy washing. The Combined Maze May Sinclair In an hour I had landed twelve trout and char, weighing 10Â½ lb. Sport in Vancouver and Newfoundland John Rogers In this light they were considered by the parliament in the 25 char.
The geologic time scale that represents the longest time span is  the eon. It is a unit of time that is equal to a billion years.
There are 4 Eons on the geological time scale in total. Era - 12 total, spanning several hundred million years each. Period - a timespan longer than an Epoch, but shorter than an Era. Epoch - spans tens of millions of years each. All of these time spans relate events recorded in the stratigraphy to a certain point (or span) in the history of the Earth.