take responsibility vs vouchsafe

take responsibility

verb
  • To accept or take on an obligation or liability. 

  • To accept blame, punishment, or accountability for something within one's role or chain of command, especially when a leader protects the subordinates who caused the problem. 

  • To blame oneself for something; to acknowledge a fault. 

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. 

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