rivet vs sparable

rivet

noun
  • Any fixed point or certain basis. 

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

verb
  • To command the attention of. 

  • To attach or fasten parts by using rivets. 

  • To make firm or immovable. 

  • To install rivets. 

sparable

noun
  • A small headless nail used in making shoes (especially the heels). 

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