fire alarm vs scare

fire alarm

noun
  • 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. 

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

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

scare

noun
  • A device or object used to frighten. 

  • A cause of slight terror; something that inspires fear or dread. 

  • A minor fright. 

verb
  • To frighten, terrify, startle, especially in a minor way. 

adj
  • lean; scanty 

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