decimation vs genocide

decimation

noun
  • The killing or destruction of any large portion of a population. 

  • A digital signal-processing technique for reducing the number of samples in a discrete-time signal; downsampling 

  • The creation of a new sequence comprising only every nth element of a source sequence. 

  • A tithe or the act of tithing. 

  • The killing or punishment of every tenth person, usually by lot. 

genocide

noun
  • The systematic killing of substantial numbers of people on other grounds. 

  • A genocide will always be followed by the denial that it ever happened. 

  • The elimination of an entire class of monsters by the player. 

  • The systematic and deliberate destruction of a group of people, typically by killing substantial numbers of them, on the basis of their ethnicity, religion, or nationality. 

  • The systematic suppression of ideas or practices on the basis of cultural or ethnic origin; culturicide. 

verb
  • To commit genocide (against); to eliminate (a group of people) completely. 

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