TS girl vs t-girl

TS girl

noun
  • Used other than figuratively or idiomatically: see TS, girl. (A girl who has a medical condition, such as Turner syndrome or Tourette syndrome, which is initialized "TS".) 

  • A trans girl, a trans woman; a male-to-female transsexual person. 

t-girl

noun
  • A trans woman. 

How often have the words TS girl and t-girl occurred in a corpus of books? (source: Google Ngram Viewer )