breakfast cereal vs groat

breakfast cereal

noun
  • A food made from processed grains, such as maize, oats, wheat or rice, usually eaten for breakfast with milk and sometimes sugar. 

groat

noun
  • Hulled grain, chiefly hulled oats. 

  • A historical English silver coin worth four English pennies, still minted as one of the set of Maundy coins. 

  • A proverbial small sum; a whit or jot. 

  • Any of various old coins of England and Scotland. 

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