dragnet vs set after

dragnet

verb
  • To make heightened efforts to catch a suspect. 

  • To drag a net across the bottom of a body of water. 

noun
  • Heightened efforts by law-enforcement personnel to capture suspects. 

  • A net dragged across the bottom of a body of water. 

set after

verb
  • To begin a chase or hunt for (someone or something). 

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