alarm bell vs scare

alarm bell

noun
  • A sudden awareness of danger. 

  • Used other than figuratively or idiomatically: see alarm, bell. 

scare

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

  • A minor fright. 

  • A device or object used to frighten. 

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

adj
  • lean; scanty 

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