clasp vs unhook

clasp

verb
  • To shut or fasten together with, or as if with, a clasp. 

  • To take hold of; to grasp. 

noun
  • A fastener or holder, particularly one that clasps. 

  • An embrace, a grasp, or handshake. 

unhook

verb
  • To remove from a hook. 

  • To unfasten by means of hooks. 

  • To unfasten the bra of (its wearer). 

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