padlock vs unbar

padlock

verb
  • To lock using a padlock. 

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

unbar

verb
  • To remove an impediment that obstructs the passage of (someone or something). 

  • To remove a prohibition. 

  • To unlock or unbolt a door that had been locked or bolted with a bar. 

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