bug-a-boo vs faerie

bug-a-boo

noun
  • A mythical, nocturnal creature; a hobgoblin. 

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

faerie

noun
  • Realm of the fays, fairyland. 

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