bug-a-boo vs scare

bug-a-boo

noun
  • Any imagined fear or threat, or a fear presumed larger than it really is. 

  • A mythical, nocturnal creature; a hobgoblin. 

scare

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

  • A minor fright. 

  • A device or object used to frighten. 

adj
  • lean; scanty 

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

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