Brother vs avian

Brother

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

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

  • 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. 

avian

noun
  • Someone who roleplays or describes themselves as being a bird or bird-like animal character with human characteristics. 

  • A bird. 

  • A bird-like or flying creature. 

adj
  • Characteristic of or pertaining to birds, or to bird-like or flying creatures. 

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