assistant vs other side

assistant

noun
  • A software tool that provides assistance in some task, a wizard program. 

  • Sales assistant. 

  • A person who assists or helps someone else. 

adj
  • Helping; lending aid or support; auxiliary. 

  • Having a subordinate or auxiliary position. 

other side

noun
  • The afterlife, as a supernatural realm inhabited by spirits of deceased people. 

  • Used other than figuratively or idiomatically: see other, side. 

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