full stop vs hard stop

full stop

noun
  • A decisive end to something. 

  • The punctuation mark "." (indicating the end of a sentence or marking an abbreviation). 

intj
  • Used to emphasize the end of an important statement or point when speaking to show something is not up for discussion or debate. 

hard stop

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

  • 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 

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