dagwood vs sandwich cake

dagwood

noun
  • A multi-layered sandwich containing cold cuts, cheese, lettuce and any of several other fillings 

sandwich cake

noun
  • A savory Swedish cake made from layers of bread with creamy fillings made from salmon, egg, vegetables, etc., served cold and sliced like a dessert cake. 

  • A layer cake. 

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