clasp vs rivet

clasp

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

  • An embrace, a grasp, or handshake. 

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

  • To take hold of; to grasp. 

rivet

noun
  • A cylindrical mechanical fastener that attaches multiple parts together by fitting through a hole and deforming the head(s) at either end. 

  • Any fixed point or certain basis. 

verb
  • To command the attention of. 

  • To attach or fasten parts by using rivets. 

  • To make firm or immovable. 

  • To install rivets. 

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