decimate vs slaughter

decimate

verb
  • To devastate: to reduce or destroy significantly but not completely. 

  • To replace a high-resolution model with another of lower but acceptable quality. 

  • To reduce to one-tenth: to destroy or remove nine-tenths of anything. 

  • To destroy or remove one-tenth of anything. 

slaughter

verb
  • To kill someone or something, especially in a particularly brutal manner. 

  • To butcher animals, generally for food. 

  • To massacre people in large numbers. 

noun
  • A rout or decisive defeat. 

  • A mass destruction of non-living things. 

  • The killing of animals, generally for food. 

  • A massacre; the killing of a large number of people. 

  • A group of iguanas. 

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