breakfast cereal vs oat

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. 

oat

noun
  • The seeds of the oat, a grain, harvested as a food crop. 

  • A simple musical pipe made of oat-straw. 

  • Widely cultivated cereal grass, typically Avena sativa. 

  • Any of the numerous species, varieties, or cultivars of any of several similar grain plants in genus Avena. 

  • The tiniest amount; a whit or jot. 

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