defense vs encroachment

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. 

encroachment

noun
  • That which is gained by such unlawful intrusion. 

  • An intrusion upon another's possessions or rights; infringement. 

  • An unlawful diminution of the possessions of another. 

  • An entry into a place or area that was previously uncommon; an advance beyond former borders; intrusion; incursion. 

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