parfait vs sweetening

parfait

noun
  • A French parfait (parfait glacé), an iced dessert made with egg yolks, sugar, cream, and flavouring (usually fruit), sometimes with the addition of a liqueur. 

  • An American parfait, a layered dessert often consisting of fruit, ice cream, pastries, whipped topping, etc. and served in a glass, often a parfait glass. 

  • A smooth pâté, usually made from liver and flavoured with liqueurs. 

sweetening

noun
  • A sweetener. 

  • The process of making something sweeter. 

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