bisexuality vs hermaphroditism

bisexuality

noun
  • The state of being sexually or romantically attracted to members of either sex or gender. 

  • The state of being bisexual (“having both male and female parts or roles”). 

hermaphroditism

noun
  • The state of having sexual organs of both the male and female sexes. 

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