bring out vs start the ball rolling

bring out

verb
  • Used other than figuratively or idiomatically: see bring, out. 

  • To elicit, evoke, or emphasize a particular quality. 

  • To place (something new for public sale) on the market; roll out. 

  • To make a shy person more confident. 

  • To cause a visible symptom such as spots or a rash 

  • To introduce (a young woman) formally into society. 

  • To introduce an individual to gay life and traditions. 

start the ball rolling

verb
  • Synonym of get the ball rolling. 

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