beer muscles vs middle-age spread

beer muscles

noun
  • A protruding stomach, supposedly indicative of excessive consumption of beer. 

  • Used other than figuratively or idiomatically: see beer, muscles. 

  • An aggressive attitude resulting from consumption of an alcoholic beverage. 

middle-age spread

noun
  • Belly fat that develops in middle age. 

How often have the words beer muscles and middle-age spread occurred in a corpus of books? (source: Google Ngram Viewer )