sugar-plum vs sweetie

sugar-plum

noun
  • Term of endearment: sweetheart, darling. 

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

sweetie

noun
  • A sweetheart. 

  • A person who is much loved. 

  • A fruit that is a crossbreed between a grapefruit and a pomelo, originating in Israel. 

  • A sweet; a candy. 

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