decapitation vs obstruction

decapitation

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

  • Beheading; the act of beheading or decapitating. 

  • The unseating of a senior politician. 

obstruction

noun
  • The act of obstructing, or state of being obstructed. 

  • Something which obstructs or impedes, either intentionally or unintentionally 

  • The condition of having the natural powers obstructed in their usual course; the arrest of the vital functions; death. 

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