clasp vs seize upon

clasp

verb
  • To take hold of; to grasp. 

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

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

  • An embrace, a grasp, or handshake. 

seize upon

verb
  • To grasp or take hold of (an object) suddenly, forcibly, or tightly. 

  • To take up, embrace, enact, or turn eagerly to (a plan, idea, ideology, cause, practice, method, etc.); to grasp, understand, and accept quickly; to adopt wholeheartedly or vigorously. 

  • To take possession of or claim (an idea, person, event, etc.) as one's own; to assimilate, absorb, annex, co-opt. 

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