balls vs belly

balls

verb
  • To engage in sexual intercourse. 

  • Speaking or acting with bravado to achieve (something) 

noun
  • A balls-up; a botched job. 

  • The testicles. 

  • Masculinity, particularly strength, courage, and force of will; chutzpah; brazeness. 

  • Synonym of bollocks, nonsense. 

adv
  • Very. Intensifier. 

belly

verb
  • To position one’s belly; to move on one’s belly. 

  • To swell and become protuberant; to bulge or billow. 

  • To cause to swell out; to fill. 

noun
  • The stomach. 

  • The main curved portion of a knife blade. 

  • The abdomen, especially a fat one. 

  • The part of anything which resembles (either closely or abstractly) the human belly in protuberance or in concavity; often, the fundus (innermost part). 

  • The womb. 

  • The hollow part of a curved or bent timber, the convex part of which is the back. 

  • The lower fuselage of an airplane. 

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