power of attorney vs sanction

power of attorney

noun
  • The legal authorisation of one person to act as the agent of another. 

  • A legal document allowing one person to act as the agent of another. 

sanction

noun
  • An approval, by an authority, generally one that makes something valid. 

  • A penalty, punishment, or some coercive measure, intended to ensure compliance; especially one adopted by several nations, or by an international body. 

  • A law, treaty, or contract, or a clause within a law, treaty, or contract, specifying any of the above. 

verb
  • To penalize (a state etc.) with sanctions. 

  • To ratify; to make valid. 

  • To give official authorization or approval to; to countenance. 

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