mayonnaise face vs melanin-challenged

mayonnaise face

noun
  • A person of northern, western, or central European heritage, especially in contrast to someone of southern Italian or Sicilian heritage. 

melanin-challenged

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

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