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.
http://geology.com/time/geologic-time-sc... It divides the earths geologic history into periods, eons and epochs to help us date when events happened. For example, dinosaurs died out at the KT boundary, ont he geologic time scale that is roughly 65 million years ago between the Cretaceous Period and Tertiary Period.