string to one's bow vs training

string to one's bow

noun
  • A skill, ability or resource. 

  • A lover, paramour or suitor. 

training

noun
  • The activity of imparting and acquiring skills. 

  • 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. 

How often have the words string to one's bow and training occurred in a corpus of books? (source: Google Ngram Viewer )