birdfeed vs oats

birdfeed

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

oats

noun
  • Seeds of an oat plant, especially prepared as food. 

  • A mass of oat plants (genus Avena, especially Avena sativa). 

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