akh vs bredder

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. 

bredder

noun
  • brother or bredrin; a close male friend or associate. 

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