caveat vs fire alarm

caveat

noun
  • A warning. 

  • A formal objection. 

  • A notice requesting a postponement of a court proceeding. 

  • A qualification or exemption. 

  • A formal notice of interest in land under a Torrens land-title system. 

verb
  • To formally object to something. 

  • To qualify a statement with a caveat or proviso. 

  • To lodge a formal notice of interest in land under a Torrens land-title system. 

fire alarm

noun
  • The sound or other warning made by a fire alarm. 

  • An electromechanical or electronic bell, klaxon, chime, horn, speaker, strobe light or other device which warns people in a building of a possible fire or other condition requiring evacuation. 

  • An emergency response to a fire by the fire department with manpower and equipment. 

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