defense vs intrusion

defense

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

  • 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. 

intrusion

noun
  • The insertion of a phoneme into the pronunciation of a word despite its absence from the spelling. (e.g. intrusive r) 

  • A structure that lies within a historic district but is nonhistoric and irrelevant to the district. 

  • The forcible inclusion or entry of an external group or individual; the act of intruding. 

  • Magma forced into other rock formations; the rock formed when such magma solidifies. 

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