black man vs bootlip

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. 

bootlip

noun
  • A large lip, especially of a black person. 

  • A black person. 

  • The lip at the top end of the shaft of a boot. 

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