beetroot vs sugar-plum

beetroot

noun
  • The edible part of the root of a beet plant, raw or prepared. 

  • A normally deep-red-coloured root vegetable usually cooked or pickled before eating; Synonym of beet. 

verb
  • To turn a bright red or purple colour. 

sugar-plum

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

  • Term of endearment: sweetheart, darling. 

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