sugar baby vs sweet pea

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 

sweet pea

noun
  • A term of endearment for something sweet or lovely; a child or an intimate partner, for example. 

  • A flowering plant, Lathyrus odoratus, grown for its bright colours and sweet fragrance. 

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