dragnet vs fishing boat

dragnet

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

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

verb
  • To make heightened efforts to catch a suspect. 

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

fishing boat

noun
  • A boat used for fishing. 

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