exemption vs imprisonment

exemption

noun
  • The state of being exempt; immunity. 

  • Freedom from a defect or weakness. 

  • An act of exempting. 

  • A deduction from the normal amount of taxes. 

imprisonment

noun
  • A confinement in a place, especially a prison or a jail, as punishment for a crime. 

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