decapitation vs scalping

decapitation

noun
  • Beheading; the act of beheading or decapitating. 

  • The ousting or destruction of the ruling body of a government or other organization. 

  • The unseating of a senior politician. 

scalping

noun
  • The action by which someone is scalped. 

  • A legitimate method of arbitrage of small price gaps created by the bid-ask spread. 

  • A fraudulent form of market manipulation in which a person buys shares immediately before recommending the shares to others, thus driving the price up. 

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