gratuity vs largesse

gratuity

noun
  • An additional payment given freely as thanks for service. 

largesse

noun
  • The gifts or money given in such a way. 

  • A benevolent demeanor. 

  • Generosity in the giving of gifts or money. 

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