bisexuality vs lesbianness

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. 

lesbianness

noun
  • The quality or condition of being lesbian. 

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