impalement vs tapping

impalement

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

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

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

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

tapping

noun
  • An act of making a light hit or strike against something. 

  • A guitar technique in which the strings are tapped against the fingerboard 

  • A connection made to some point between the end terminals of a transformer coil or other component. 

  • The process by which a resource is tapped or exploited. 

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