Ebony vs Grey

Ebony

name

  • A female given name from English. 

Grey

name

  • An English earldom. 

  • A surname transferred from the nickname, alternative spelling of Gray 

  • A river, the Grey River, on the West Coast of the South Island of New Zealand. 

noun

  • A member of the Royal Scots Greys, a cavalry regiment of the British Army from 1707 to 1971. 

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