abdominal region vs middle-age spread

abdominal region

noun
  • Used other than figuratively or idiomatically: see abdominal, region. 

  • One of the nine areas that the abdomen is divided into. 

middle-age spread

noun
  • Belly fat that develops in middle age. 

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