crucifixion vs impalement

crucifixion

noun
  • The military punishment of being tied to a fixed object, often with the limbs in a stretched position. 

  • An ordeal, terrible, especially malicious treatment imposed upon someone. 

  • An execution by being nailed or tied to an upright cross and left to hang there until dead. 

  • The death on the Cross of Christ. 

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. 

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