sugar-plum vs sweetcheeks

sugar-plum

noun
  • Term of endearment: sweetheart, darling. 

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

sweetcheeks

noun
  • Term of endearment 

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