bring on vs spark off

bring on

verb
  • To make something appear, as on a stage or a place of competition. 

  • To cause. 

  • To pose a challenge or threat; to attack; to compete aggressively. 

spark off

verb
  • To initiate something by providing the necessary conditions. 

How often have the words bring on and spark off occurred in a corpus of books? (source: Google Ngram Viewer )