caramel vs tow-colored

caramel

adj
  • Of a yellow-brown color. 

noun
  • 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. 

  • A (sometimes hardened) piece of this confection. 

tow-colored

adj
  • Of a pale yellow colour, like that of flax. 

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