melanin-challenged vs nonblack

melanin-challenged

adj
  • white; having white skin or belonging to the white culture; not black 

nonblack

adj
  • Not of African descent; not racially black. 

  • Not black in colour. 

noun
  • A nonblack person. 

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