accidentally on purpose vs promised

accidentally on purpose

adv
  • Deliberately, though apparently accidentally. 

promised

adj
  • Under obligation to some future commitment, such as a marriage or vocation. 

  • Predicted; expected; anticipated. 

  • Due to become manifest because of a past promise. 

How often have the words accidentally on purpose and promised occurred in a corpus of books? (source: Google Ngram Viewer )