curtains vs once and for all

curtains

noun
  • An end or death. 

  • A ring of clear liquid, forming into drops, near the top of a glass of fortified wine; the result of differential evaporation of alcohol and subsequent changes in surface tension; an example of the Marangoni effect. 

once and for all

adv
  • Finally, permanently, conclusively. 

How often have the words curtains and once and for all occurred in a corpus of books? (source: Google Ngram Viewer )