accredit vs sanction

accredit

verb
  • To put or bring into credit; to invest with credit or authority; to sanction. 

  • To certify as meeting a predetermined standard; to certify an educational institution as upholding the specified standards necessary for the students to advance. 

  • To enter on the credit side of an account book. 

  • To send with letters credential, as an ambassador, envoy, or diplomatic agent; to authorize, as a messenger or delegate. 

  • To credit. 

  • To ascribe; attribute; credit with. 

  • To believe; to put trust in. 

  • To recognize as outstanding. 

sanction

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

  • To ratify; to make valid. 

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

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 accredit and sanction occurred in a corpus of books? (source: Google Ngram Viewer )