discoloration vs lividity

discoloration

noun
  • A discolored spot; a stain. 

  • The act of discoloring, or the state of being discolored; alteration of hue or appearance. 

lividity

noun
  • A livid area of skin, such as a bruise, or as is often found on cadavers. 

  • Livor mortis, suggillation. 

  • The state or quality of being livid. 

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