act of God vs nativity

act of God

noun
  • Used other than figuratively or idiomatically: see act, of, God. 

  • An unforeseen occurrence beyond one's control, such as a natural disaster. 

nativity

noun
  • The birth of Jesus. 

  • The quality of being native or innate. 

  • The festival celebrating the birth of Jesus, Christmas Day; the festival celebrating the birth of the Virgin Mary or the birth of Saint John the Baptist. 

  • Origin; founding. 

  • A set of figurines used to create a nativity scene. 

  • Place of origin; place to which a species is native. 

  • Someone's birth considered as a means of astrology; a horoscope associated with a person's birth. 

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