akh vs bro

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. 

bro

noun
  • brother (a male comrade or friend; one who shares one’s ideals) 

  • fratboy (or someone that espouses the fraternity bro culture) 

  • brother (usually used to address a male) 

  • brother (a male sibling) 

pron
  • he or him 

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