deadbolt vs ringlet

deadbolt

noun
  • The part of the lock which is moved when the key is engaged. 

  • A kind of lock in which the bolt (moving portion) is held in position by the cylinder rather than by a spring and so cannot be retracted except by turning the cylinder. 

verb
  • To fasten or secure with a deadbolt. 

ringlet

noun
  • A lock, tress. 

  • Any of various butterflies with small rings on the wings, in the tribe Satyrini of the family Nymphalidae, such as Aphantopus hyperantus. 

  • A small ring. 

verb
  • To surround or encircle like a ringlet. 

  • To form into ringlets. 

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