bigender vs pangendered

bigender

adj
  • Having a tendency to move between feminine and masculine gender-typed behaviour depending on context. 

  • Having two genders simultaneously: both male and female. 

pangendered

adj
  • Having or pertaining to mixed or fluid gender identity that encompasses aspects of all genders. 

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