defense vs extenuation

defense

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

  • 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 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. 

extenuation

noun
  • The action of lessening, or seeking to lessen, the guilt of (an offence or fault) by alleging partial excuses; and instance or means of doing this; a plea in mitigation of censure. 

  • The action of representing (something) as slight and trifling; underrating; an instance of this, a plea to this end; a modification in terms. 

  • The action or process of making or becoming thin; an instance of this; a shrunken condition; leanness, emaciation. 

  • Thin garments. 

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