balls vs guts

balls

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

  • A balls-up; a botched job. 

  • The testicles. 

  • Synonym of bollocks, nonsense. 

adv
  • Very. Intensifier. 

verb
  • Speaking or acting with bravado to achieve (something) 

  • To engage in sexual intercourse. 

guts

noun
  • Courage; determination. 

  • The center of the field. 

  • Content, substance. 

  • One's innermost feelings. 

  • The entrails or contents of the abdomen. 

  • The essential, core parts. 

  • The ring in the gambling game two-up in which the spinner operates; the centre. 

verb
  • To show determination or courage (especially in the combination guts out). 

  • To eat greedily. 

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