defence vs rationale

defence

noun
  • An argument in support or justification of something. 

  • A strategy and tactics employed to prevent the other team from scoring; contrasted with offence. 

  • The portion of a team dedicated to preventing the other team from scoring; contrasted with offence. 

  • Government policy or (infra)structure related to the military. 

  • Something used to oppose attacks. 

  • The action of defending, of protecting from attack, danger or injury. 

rationale

noun
  • A justification or rationalization for something. 

  • An explanation of the basis or fundamental reasons for something. 

  • A liturgical vestment worn by some Christian bishops of various denominations. 

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