delightful vs drop-dead

delightful

adj
  • Pleasant; pleasing, bringing enjoyment, satisfaction, or pleasure. 

drop-dead

adv
  • Absolutely final; being the deadline, especially in relation to a date set out in a contract upon which adverse consequences will flow if the contract has not been fulfilled. 

  • Very impressively or spectacularly. 

How often have the words delightful and drop-dead occurred in a corpus of books? (source: Google Ngram Viewer )