beer belly vs potbelly

beer belly

noun
  • A protruding belly caused by excess fat stored in the abdomen and colloquially attributed to the consumption of beer. 

potbelly

noun
  • A large, swollen, or protruding abdomen; a paunch. 

  • A potbelly stove. 

  • A Vietnamese Pot-bellied pig. 

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