mandem vs nigga

mandem

noun
  • group of men or boys; male friends 

nigga

noun
  • Any person, though chiefly male. 

  • A male as opposed to a female. 

  • A close and loyal friend. 

  • A black person (usually male), especially an African American. 

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