brown sugar vs glycogen

brown sugar

noun
  • Refined sugar to which molasses has been added. 

  • An attractive black woman. 

  • Heroin. 

  • Sugar which has been only partially refined and still contains molasses. 

glycogen

noun
  • A polysaccharide that is the main form of carbohydrate storage in animals; converted to glucose as needed. 

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