buttercream vs moisturising cream

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. 

moisturising cream

noun
  • A cream that moisturises the skin. 

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