militia vs occupation

militia

noun
  • Synonym of militsia: the national police force of certain countries (e.g. Belarus). 

  • An army of trained civilians, which may be an official reserve army, called upon in time of need, the entire able-bodied population of a state which may also be called upon, or a private force not under government control. 

occupation

noun
  • The control of a country or region by a hostile military and/or paramilitary force. 

  • The act, process or state of possessing a place. 

  • An activity or task with which one occupies oneself; usually specifically the productive activity, service, trade, or craft for which one is regularly paid; a job. 

How often have the words militia and occupation occurred in a corpus of books? (source: Google Ngram Viewer )