deadbolt vs padlock

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. 

padlock

noun
  • A detachable lock that can be used to secure something by means of a sliding or hinged shackle 

verb
  • To lock using a padlock. 

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