hang fire vs wait and see

hang fire

verb

  • To wait or hold back. 

  • To fail to fire immediately when the trigger is pulled. 

noun

  • The situation when a gun does not immediately fire when the trigger is pulled, but may fire shortly after. 

wait and see

verb

  • To await the course of events before taking action. 

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