scarification vs snipping

scarification

noun
  • The act of scarifying: raking the ground harshly to remove weeds, etc. 

  • A medieval form of penance in which the skin was damaged with a knife or hot iron. 

  • A route of administration for some vaccinations and tests: rather than hypodermic injection, the site is inoculated intradermally not with any injection but rather only with small, shallow pricks or scratches; the needle is not hollow. 

  • The scratching, etching, burning / branding, or superficially cutting designs, pictures, or words into the skin as a permanent body modification. 

snipping

noun
  • The act by which something is snipped or cut. 

  • A piece cut off; a clipping. 

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