enclosing vs grapnel

enclosing

noun
  • That which encloses. 

  • The act or situation by which something is enclosed. 

grapnel

noun
  • A small anchor, having more than two flukes, used for anchoring a small vessel. 

  • A grappling iron. 

  • A device with a multiple hook at one end and attached to a rope, which is thrown or hooked over a firm mooring to secure an object attached to the other end of the rope. 

verb
  • To connect (ships) with a grapnel. 

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