Brother vs Mister

Brother

noun
  • Title of respect for an adult male member of a religious or fraternal order. 

  • A title used to personify or respectfully refer to concepts or animals. 

  • Title of respect for an adult male member of a fraternal/sororal organization, or comrade in a movement, or even a stranger using fictive kin. 

Mister

noun
  • General title or respect of an adult male. 

  • Official form of address of a president of a nation. 

  • Formal address to any official of an organization. 

  • A warrant officer or cadet in the United States Military Academy at West Point. 

  • An informal title used before a nickname or other moniker. 

  • Official title of a military man, usually anyone below rank of captain. 

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