daydreaming vs engrossment

daydreaming

noun
  • An instance of daydreaming; a daydream or reverie. 

engrossment

noun
  • The state of being engrossed; concentration or preoccupation. 

  • The fact or instance of preparing the final draft legal document for execution or completion. 

  • Such document that has not yet been executed or completed. 

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