cornpone vs johnnycake

cornpone

noun
  • A form of cornbread made without milk or eggs. 

  • Something or someone considered stereotypical of rural, Southern US attitudes or attributes. 

johnnycake

noun
  • A dense, baked or fried flatbread made of cornmeal. 

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