sugar baby vs sugar daddy

sugar baby

noun
  • 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 

  • A term of endearment; sweetheart. 

sugar daddy

noun
  • A man who spends money for the benefit of a relationship with an often younger romantic or sexual partner. 

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