black as the ace of spades vs shadowy

black as the ace of spades

adj

  • Utterly black; pitch-black. 

shadowy

adj

  • Dark, obscure. 

  • Vague, dim, unclear, faint of an image. 

  • In shadow; darkened by shadows. 

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