bane vs night hag

bane

noun
  • A cause of misery or death. 

  • A disease of sheep. 

  • Bone. 

verb
  • To be the bane of. 

  • To kill, especially by poison; to be the poison of. 

night hag

noun
  • a demon that gives rise to sleep paralysis 

How often have the words bane and night hag occurred in a corpus of books? (source: Google Ngram Viewer )