noon vs punch line

noon

noun
  • The highest point; culmination. 

  • The letter ن in the Arabic script. 

  • The time of day when the sun is in its zenith; twelve o'clock in the day, midday. 

verb
  • To relax or sleep around midday 

punch line

noun
  • A final, concluding statement that an explanation has been leading up to; a conclusion. 

  • The butt of a joke; laughing stock. 

  • The final part of a joke; the word, sentence, or exchange of sentences that is intended to be funny and provokes laughter from the listeners. 

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