bolo vs shiv

bolo

verb
  • To attack or despatch with a bolo knife. 

  • To fail to meet the minimum standards of marksmanship. 

  • To dress (somebody) in a bolo. 

noun
  • A soldier not capable of the minimum standards of marksmanship. 

  • A request for law enforcement officers to be on the lookout for a suspect. 

  • a type of punch; an uppercut. 

  • A long, heavy, single-edged machete. 

  • A string or leather necktie secured with an ornamental slide. 

shiv

verb
  • To stab someone with anything not normally used as a stabbing weapon. 

  • To stab someone with a shiv. 

noun
  • A knife, especially a makeshift one fashioned from something not normally used as a weapon (like a plastic spoon or a toothbrush). 

  • A particular woody by-product of processing flax or hemp. 

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