PT (physical training) vs training

PT (physical training)

training

noun
  • Action of the verb to train. 

  • The result of good social upbringing. 

  • The process by which two modems determine which protocol and speed to use; handshaking. 

  • The recording of multiple samples of a user's voice to aid pattern recognition. 

  • The activity of imparting and acquiring skills. 

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