comedown vs drawing board

comedown

noun
  • A calm, mellow period experienced after the initial high from taking drugs. 

  • A sudden drop to a lower status, condition or level; a disappointment or letdown. 

drawing board

noun
  • The planning stage of a project. 

  • A plane surface or table to which paper can be fastened for drawing purposes. 

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