belly vs run up

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. 

run up

verb
  • To rise; to swell; to grow; to increase. 

  • To approach (an event or point in time). 

  • To accumulate (a debt). 

  • To thrust up, as anything long and slender. 

  • To make something, usually an item of clothing, very quickly. 

  • To take to a destination or before an authority. 

  • Used other than figuratively or idiomatically: see run, up. 

  • Of a bowler, to run, or walk up to the bowling crease in order to bowl a ball. 

  • To bring (a flag) to the top of its flag pole. 

  • To run (towards someone or something); to hasten to a destination. 

  • To erect hastily, as a building. 

  • To string up; to hang. 

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