litany vs renewal

litany

noun
  • A prolonged or tedious list. 

  • A ritual liturgical prayer in which a series of prayers recited by a leader are alternated with responses from the congregation. 

renewal

noun
  • The act of renewing. 

  • An offensive action made immediately after a parried one. 

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