bigender vs intergender

bigender

adj
  • Having two genders simultaneously: both male and female. 

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

intergender

adj
  • Taking place between people of opposite genders. 

  • intergender friendship, intergender wrestling 

  • Being midway between male and female. 

noun
  • A person whose gender identity is midway between male and female. 

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