dragnet vs fish trap

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. 

fish trap

noun
  • A contraption made of wires, rods, fishing-net or other suitable materials with the purpose of catching fish alive. 

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