unluck vs woe

unluck

noun
  • Absence or lack of luck; lucklessness; bad luck; misfortune. 

woe

noun
  • Great sadness or distress; a misfortune causing such sadness. 

  • A curse; a malediction. 

  • Calamity, trouble. 

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