unfortunately vs woefully

unfortunately

adv
  • Happening through bad luck, or because of some unfortunate event. 

  • Used (as a parenthetical word) to express disappointment, compassion, sorrow, regret or grief. 

woefully

adv
  • In a woeful manner; to an unfortunately great extent. 

  • woefully inadequate 

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