transgendered vs two-spirit

transgendered

noun
  • A transgender person. 

adj
  • Transgender; denoting or relating to a person whose gender identity does not correspond with their sex assigned at birth. 

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 transgendered and two-spirit occurred in a corpus of books? (source: Google Ngram Viewer )