pound cake vs sugar baby

pound cake

noun
  • A term of attraction or desire 

  • A dense yellow cake, the traditional recipe for which consists of equal quantities (nominally one pound) of butter, eggs, flour, and sugar. 

sugar baby

noun
  • A term of endearment; sweetheart. 

  • The younger recipient (usually female or a bottom) of interest from a sugar daddy or sugar mama, especially financial and romantic in an intergenerational relationship 

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