sponge cake vs strudel

sponge cake

noun
  • A light, soft, baked dessert (commonly layered with cream and jam) that is typically made with flour, sugar, baking powder and eggs, and has a firm, yet well aerated structure, similar to that of a sea sponge. 

strudel

noun
  • A pastry made from multiple thin layers of dough rolled up and filled with fruit, etc. 

  • Synonym of at sign (@) 

  • A vertical hole in sea ice through which downward jet-like, buoyancy-driven drainage of flood water is thought to occur. 

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