blackness vs nig-nog

blackness

noun
  • The state or quality of being black in colour. 

  • The state of being of African descent. 

  • The quality of being evil or dismal. 

  • The experiences and culture of African-American people. 

nig-nog

noun
  • A person of color, especially, a black person. 

  • A foolish person; hence, a raw and unskilled recruit. 

How often have the words blackness and nig-nog occurred in a corpus of books? (source: Google Ngram Viewer )