ladyboy vs two-spirit

ladyboy

noun
  • A trans woman or transfeminine person in or from Asia. 

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