periodization 

Dividing a certain century or time into section for seeing the changes and significance in that section.

The periodization of Rome can be divided into three group: early ages, middle ages, and dark ages.

periodization by dogtown531 December 22, 2009

periodicating 

Woman who is bitchy cuz she is on her period

Trish was periodicating today !

periodicating by Lynn c November 15, 2017