cumshaw vs vouchsafe

cumshaw

verb
  • To give or make a present to. 

noun
  • A gratuity or tip as thanks for a service 

vouchsafe

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

  • To receive or accept in condescension. 

  • To disclose or divulge. 

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