caramel vs hard candy

caramel

noun
  • A smooth, chewy, sticky confection made by heating sugar and other ingredients until the sugars polymerize and become sticky. 

  • A yellow-brown color, like that of caramel. 

  • A (sometimes hardened) piece of this confection. 

adj
  • Of a yellow-brown color. 

hard candy

noun
  • A candy prepared from one or more syrups boiled to a temperature of 160°C (320°F), thereafter becoming stiff and brittle at room temperature. 

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