defense vs stronghold

defense

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

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

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

  • The case presented by the defendant in a legal proceeding. 

  • The lawyer or team thereof who presents such a case. 

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

stronghold

noun
  • A place built to withstand attack; a fortress. 

  • A place of domination by, or refuge or survival of, a particular group or idea. 

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