originate vs start the ball rolling

originate

verb
  • To cause (someone or something) to be; to bring (someone or something) into existence; to produce or initiate a person or thing. 

  • To come into existence; to have origin or beginning; to spring, be derived (from, with). 

start the ball rolling

verb
  • Synonym of get the ball rolling. 

How often have the words originate and start the ball rolling occurred in a corpus of books? (source: Google Ngram Viewer )