ebony vs melanoid

ebony

noun
  • A black key on a piano or other keyboard instrument. 

  • A tree that yields such wood. 

  • A deep, dark black colour. 

  • A hard, dense, deep black wood from various subtropical and tropical trees, especially of the genus Diospyros. 

adj
  • Made of ebony wood. 

  • Dark-skinned; black; especially in reference to African-Americans. 

  • A deep, dark black colour. 

melanoid

adj
  • Relating to, or afflicted with, melanosis. 

  • Relating to, or resembling, melanin. 

noun
  • Synonym of melanoidin 

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