gumdrop vs jelly bean

gumdrop

noun
  • A small chewy candy made with corn syrup, gelatin, and flavouring. 

jelly bean

noun
  • A small, bean-shaped, chewy candy/sweet with a firm coating and a jelly-like center, made of sugar, flavoring, coloring and sometimes starch or other thickener, and usually sold assorted in a wide variety of flavors and bright colors. 

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