birdfeed vs breakfast cereal

birdfeed

noun
  • Food intended for birds, often a mixture of various seeds. 

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. 

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