cereal vs millet

cereal

noun
  • A type of grass (such as wheat, rice or oats) cultivated for its edible grains. 

  • The grains of such a grass. 

  • Breakfast cereal. 

millet

noun
  • Any of a group of various types of grass or its grains used as food, widely cultivated in the developing world. 

  • A semi-autonomous confessional community under the Ottoman Empire, especially a non-Muslim one. 

  • Common millet, in particular Panicum miliaceum. 

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