hard stop vs hard-stop

hard stop

noun
  • A mechanical device that limits the travel of a mechanism. 

  • A tactic used by armed police to stop a vehicle believed to contain dangerous criminals. 

  • Synonym of full stop 

  • A definite time when someone must end a task in order to meet another time commitment. 

hard-stop

How often have the words hard stop and hard-stop occurred in a corpus of books? (source: Google Ngram Viewer )