bisexuality vs hermaphrodism

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”). 

hermaphrodism

noun
  • A congenital condition in which an organism possesses the reproductive organs of both sexes. 

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