frappe vs sweetening

frappe

noun
  • An iced, sweetened, beaten coffee drink, associated with Greek cuisine. 

  • A thick milkshake containing ice cream. 

  • A liqueur or cocktail served on shaved ice. 

sweetening

noun
  • A sweetener. 

  • The process of making something sweeter. 

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