doorman vs gatekeeper

doorman

noun
  • A person who holds open the door at the entryway (entrance) to a building, summons taxicabs, and provides an element of security; in apartment buildings, he also accepts deliveries and may perform certain concierge type services. 

gatekeeper

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

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

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