shiv vs straight razor

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. 

verb
  • To stab someone with a shiv. 

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

straight razor

noun
  • A razor with a blade that can fold into its handle. 

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