part company vs ship out

part company

verb
  • To end a relationship. 

  • To separate; go their own ways. 

ship out

verb
  • To leave, get out, or resign. 

  • To depart, especially for a sea voyage or military assignment. 

  • To get rid of, expel, or discard. 

  • To send, especially by means of a transport vehicle. 

How often have the words part company and ship out occurred in a corpus of books? (source: Google Ngram Viewer )