cereal vs harvesting

cereal

noun
  • The grains of such a grass. 

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

  • Breakfast cereal. 

harvesting

noun
  • The gathering of a mature crop; a harvest. 

  • The gathering of any resource. 

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