pansexuality vs sexual orientation

pansexuality

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

  • Sexuality that encompasses all kinds of sexuality. 

sexual orientation

noun
  • One's tendencies of sexual attraction, considered as a whole. 

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