Guinea vs Nigger

Guinea

name
  • A country in West Africa. Official name: Republic of Guinea. 

  • Someone of Italian descent in the United States. 

  • The coast of West Africa between Morocco and the Congo, particularly the north shore of the Gulf of Guinea. 

Nigger

name
  • Niger (country). 

  • A given name for a black pet. 

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