hermaphroditism vs transsexuality

hermaphroditism

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

transsexuality

noun
  • The state, condition, or properties of being transsexual. 

  • The psychological diagnosis of gender identity disorder. 

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