non-binary vs two-spirit

non-binary

noun
  • A non-binary (genderqueer) person. 

  • Something which is not a binary; a computer file that is not readable text. 

adj
  • Having or pertaining to a gender identity not represented by the gender binary; not exclusively male or female; genderqueer. 

  • Not binary. 

two-spirit

noun
  • A Native (North) American gender-variant, homosexual or bisexual person (especially one belonging to a traditional tribal third-gender, fourth-gender or transgender cultural category that has a ceremonial role). 

adj
  • Pertaining to or being a two-spirit. 

  • Involving two spirits; especially, pertaining to the doctrine of dualism espoused in the so-called Treatise on the Two Spirits in the Dead Sea Scrolls. 

How often have the words non-binary and two-spirit occurred in a corpus of books? (source: Google Ngram Viewer )