bisexuality vs bisexualness

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. 

bisexualness

noun

  • bisexuality 

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