call together vs stand down

call together

verb
  • To request that (certain people) assemble; to gather (certain people) for a meeting. 

stand down

verb
  • To withdraw or retire from a position or from a team. 

  • To wait; to stop pursuing, stop fighting, or relax from a heightened readiness posture. 

How often have the words call together and stand down occurred in a corpus of books? (source: Google Ngram Viewer )