black man vs charcoal

black man

noun
  • A male adult member of an ethnic group having dark pigmentation of the skin, typically of sub-Saharan African descent; or the appearance thereof. 

  • Used other than figuratively or idiomatically: see black, man. 

charcoal

noun
  • A very dark gray colour. 

  • impure carbon obtained by destructive distillation of wood or other organic matter, that is, heating it in the absence of oxygen. 

  • A stick of black carbon material used for drawing. 

  • A drawing made with charcoal. 

adj
  • Made of charcoal. 

  • Of a dark gray colour. 

verb
  • To cook over charcoal. 

  • To draw with charcoal. 

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