black man vs spearchucker

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. 

spearchucker

noun
  • A black (African or African-American) person. 

  • An agitator. 

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