coup de grace vs windup

coup de grace

windup

adj
  • Operated by a coiled spring that is wound by hand. 

noun
  • A practical joke or tease. 

  • A long explanation of some line of thought to reach a certain conclusion. 

  • The act of preparing for a certain style of pitching. 

  • The act of ending or concluding something. 

  • The last part of something; a conclusion. 

How often have the words coup de grace and windup occurred in a corpus of books? (source: Google Ngram Viewer )