wait a minute vs wait on

wait a minute

verb
  • Used other than figuratively or idiomatically: see wait, minute. 

intj
  • Used to indicate disagreement or doubt. 

  • Used to indicate a new insight or dawning understanding. 

wait on

verb
  • To wait for (a thing, or an event to take place). 

  • To provide a service to (someone); to act as a servant to (someone); to serve (someone) as a waiter or waitress in a restaurant. 

  • To wait for (a person). 

  • To fly above its master, waiting till game is sprung. 

  • To be in store for (someone). 

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