caesura vs moratorium

caesura

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

  • Using two words to divide a metrical foot. 

  • 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. 

moratorium

noun
  • A suspension of an ongoing activity. 

  • An authorization to a debtor, permitting temporary suspension of payments. 

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