caramel vs olfactory

caramel

noun
  • A (sometimes hardened) piece of this confection. 

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

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

adj
  • Of a yellow-brown color. 

olfactory

noun
  • The sense of smell. 

adj
  • Concerning the sense of smell. 

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