bisexuality vs intersexuality

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”). 

intersexuality

noun
  • The state of having the physical features of both sexes, or of having ambiguous sex, i.e. not unambiguously male or female. 

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