enabler vs gatekeeper

enabler

noun
  • One who gives someone else the power to behave in a certain way. 

  • One who or that which helps something to happen. 

  • One who encourages a bad habit in another (typically drug addiction) by their behaviour. 

gatekeeper

noun
  • A person or group who controls access to something or somebody. 

  • One who gatekeeps. 

  • In dissociative identity disorder, an aspect of the personality that controls access to the various identities. 

  • A person who guards or monitors passage through a gate. 

  • A common orange and brown butterfly with eyespots, Pyronia tithonus, of the family Nymphalidae. 

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