discolored vs nonblack

discolored

adj
  • Deprived of color, or given the wrong color; pale, stained. 

nonblack

adj
  • Not black in colour. 

  • Not of African descent; not racially black. 

noun
  • A nonblack person. 

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