collate vs set off

collate

verb
  • To examine diverse documents and so on, to discover similarities and differences. 

  • To admit a cleric to a benefice; to present and institute in a benefice, when the person presenting is both the patron and the ordinary; followed by to. 

  • To assemble something in a logical sequence. 

  • To sort multiple copies of printed documents into sequences of individual page order, one sequence for each copy, especially before binding. 

set off

verb
  • To enhance by emphasizing differences. 

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

  • To leave; to begin a journey or trip. 

  • 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 begin; to cause; to initiate. 

  • To cause to explode, let off. 

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