black as the ace of spades vs ebon

black as the ace of spades

adj

  • Utterly black; pitch-black. 

ebon

adj

  • Black in colour. 

  • Made of ebony. 

noun

  • Ebony; an ebony tree. 

How often have the words black as the ace of spades and ebon occurred in a corpus of books? (source: Google Ngram Viewer )