vouchsafe vs withhold

vouchsafe

verb
  • To receive or accept in condescension. 

  • To graciously give, to condescendingly grant a right, benefit, outcome, etc.; to deign to acknowledge. 

  • To disclose or divulge. 

withhold

verb
  • To keep (information, assent etc) to oneself rather than revealing it. 

  • To stay back. 

  • To keep (a physical object that one has obtained) to oneself rather than giving it back to its owner. 

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