binge eating vs polyphagia

binge eating

noun
  • The consumption of a large amount of food in a relatively short time; often as a symptom of bulimia 

polyphagia

noun
  • An excessive appetite for food 

  • The eating of many different types of food 

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