belly vs bug out

belly

verb
  • To cause to swell out; to fill. 

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

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

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. 

bug out

verb
  • To cause to bulge. 

  • To miss school, play truant, play hooky. 

  • To crash or glitch. 

  • To leave (a place) hastily. 

  • To abandon someone without warning. 

  • To freak out, to go crazy, e.g. from worry. 

noun
  • A rapid retreat, a rout. 

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