Cereal vs Grain

Cereal

name

  • A village in Alberta, Canada. 

adj

  • Of or relating to the goddess Ceres. 

Grain

name

  • A village on the Isle of Grain, Medway borough, Kent, England (OS grid ref TQ8876). 

  • A surname. 

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