generate vs set off

generate

verb
  • To appear or occur; be generated. 

  • To produce as a result of a chemical or physical process. 

  • To procreate, beget. 

  • To form a figure from a curve or solid. 

  • To bring into being; give rise to. 

set off

verb
  • To begin; to cause; to initiate. 

  • To put into an angry mood; to start (a person) ranting or sulking, etc. 

  • To leave; to begin a journey or trip. 

  • To enhance by emphasizing differences. 

  • To offset, to compensate for: to reduce the effect of, by having a contrary effect. 

  • To deface or soil the next sheet; said of the ink on a freshly printed sheet, when another sheet comes in contact with it before it has had time to dry. 

  • To cause to explode, let off. 

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