nonblack vs unstained

nonblack

adj
  • Not black in colour. 

  • Not of African descent; not racially black. 

noun
  • A nonblack person. 

unstained

adj
  • Not dyed or discolored; not marred by any stains, marks, or spotting. 

  • Pure, pristine, clean, immaculate, unadulterated. 

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