tranny vs transvestite

tranny

noun
  • A transsexual, transgender, or transvestite person, usually a trans woman. 

  • A mechanical transmission, a gearbox. 

  • A transistor radio. 

  • A transformer. 

  • A transition between moves. 

transvestite

noun
  • A person who sometimes wears clothes traditionally worn by and associated with the opposite sex; typically a male who cross-dresses occasionally by habit or personal choice. 

  • A person, typically a heterosexual male, who compulsively seeks and derives paraphilic sexual arousal from cross-dressing, especially if the urges and behavior cause the patient distress or social impairment. 

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