bun vs layer cake

bun

noun
  • A cupcake. 

  • A tight roll of hair worn at the back of the head. 

  • A drunken spree. 

  • The vagina. 

  • A newbie. 

  • A Korean unit of length equivalent to about 0.3 cm. 

  • marijuana cigarette, joint 

  • A small bread roll, often sweetened or spiced. 

  • A buttock. 

verb
  • To form (the hair) into a bun. 

  • To smoke cannabis. 

  • To shoot. 

layer cake

noun
  • A cake consisting of multiple stacked sheets of cake, held together by frosting or jam, etc. 

  • A type of layering of materials, used in some nuclear bombs. 

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