jo vs sugar-plum

jo

noun
  • Darling, sweetheart. 

  • The staff used in the Japanese martial art of jodo or jojutsu. 

sugar-plum

noun
  • Term of endearment: sweetheart, darling. 

  • A round or oval sweet/piece of candy made of boiled sugar. 

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