coal black vs swarthy

coal black

adj
  • Of an intensely black colour, like that of coal. 

noun
  • A black colour, like that of coal; charcoal. 

swarthy

adj
  • Dark-skinned; Black. 

  • Tawny, dusky, dark. 

  • Weathered, rough. 

  • A dark grey color. 

  • Evil, malicious. 

  • Darker-skinned than white, but lighter-skinned than tawny; tan. 

noun
  • A swarthy person. 

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