dragnet vs lay hold of

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.

lay hold of

verb

To seize; catch; apprehend.
To obtain.

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