buttercream vs crème

buttercream

noun
  • A type of thick, sweet icing or cake-filling made by creaming butter (or sometimes another fat, such as margarine) with powdered sugar. 

crème

noun
  • A very sugary, fluffy white cream derivative. 

  • Cream 

verb
  • To whip into a thick creamy texture. 

adj
  • Synonym of cream 

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