bisexuality vs transsexuality

bisexuality

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

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

transsexuality

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

  • The psychological diagnosis of gender identity disorder. 

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