cream slice vs vanilla slice

cream slice

noun
  • A vanilla slice. 

  • A wooden knife with a long thin blade, used in handling cream or ice cream. 

vanilla slice

noun
  • A snack similar to a mille-feuille, consisting of a layer of vanilla custard or cream between two layers of pastry. 

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