come by vs lay hold of

come by

verb
  • To obtain; to get, especially by chance or involuntarily. 

  • To come near to; to pass; to visit. 

intj
  • A command to a sheepdog to move clockwise around the sheep 

lay hold of

verb
  • To obtain. 

  • To seize; catch; apprehend. 

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