lesbianism vs pansexuality

lesbianism

noun
  • Female homosexuality; the state (of a woman) of being sexually attracted to other women. 

pansexuality

noun
  • Sexuality that encompasses all kinds of sexuality. 

  • A sexual orientation characterized by the potential for aesthetic attraction, romantic love and/or sexual desire for people regardless of their gender or sex. 

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