disapprove vs sanction

disapprove

verb
  • To condemn; to consider wrong or inappropriate; used with of. 

  • To have or express an unfavorable opinion. 

  • She disapproves of rap music because of its sometimes aggressive lyrics. 

  • To refuse to approve; reject. 

sanction

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

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

  • To ratify; to make valid. 

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. 

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