caesura vs persistence

caesura

noun
  • Using two words to divide a metrical foot. 

  • A pause or interruption in a poem, music, building, or other work of art. 

  • The caesura mark ‖ or ||. 

  • A break of an era or other measure of history and time; where one era ends and another begins; turning point. 

persistence

noun
  • Continuation of the previous day's weather (particularly temperature and precipitation statistics). 

  • The number of times an operation can be iteratively applied to a number before it reaches a permanently constant state. 

  • The property of being persistent. 

  • Of data, the property of continuing to exist after the termination of the program. 

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