gatekeeper vs libero

gatekeeper

noun
  • One who gatekeeps. 

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

  • 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. 

libero

noun
  • a sweeper 

  • a designated back-row player intended to be used as a ball-control specialist 

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