deadbolt vs lock out

deadbolt

verb
  • To fasten or secure with a deadbolt. 

noun
  • 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. 

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

lock out

verb
  • To inadvertently prevent (a person, particularly oneself) from entering a place, by leaving it locked. 

  • To prevent from accessing a data structure. 

noun
  • An event in which an employer bars employees from working as a tactic in negotiating terms of employment, particularly in response to a strike or threat to strike. 

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