akh vs bredrin

akh

noun
  • Brother; a close male friend or associate. 

  • In Egyptian mythology, (roughly) a spirit of the dead that has successfully completed its transition to the afterlife. 

bredrin

noun
  • A close male friend, family member, or comrade. 

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