gassing vs impalement

gassing

noun
  • The process of passing cotton goods between two rollers and exposing them to numerous minute jets of gas to burn off the small fibres. 

  • boasting; insincere or empty talk 

  • Any similar process of singeing. 

  • Poisoning by noxious gas. 

  • The liberation of hydrogen from an overcharged battery due to electrolysis of the electrolyte. 

impalement

noun
  • A space fenced in, such as by palings, possibly in the form of an enclosure or cup. 

  • (obsolete) In the sense of an enclosure, the calyx of a flower. In still older works, also spelt empalement (q.v.) 

  • The joining of two coats of arms on one shield. 

  • The act of torturing or executing someone by impaling them on a sharp stake. 

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