dextrin vs glycogen

dextrin

noun
  • Any of a range of oligomers of glucose, intermediate in complexity between maltose and starch, produced by the enzymatic hydrolysis of starch; used commercially as adhesives. 

glycogen

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

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