chaser vs operator

chaser

noun
  • Synonym of prison chaser (“person who guards military prisoners”) 

  • A horse: (originally) a horse used for hunting; (now) a horse trained for steeplechasing, a steeplechaser. 

  • A drink drunk after another of a different kind. 

  • A piece of music, etc. played after a performance while the audience leaves. 

  • A long piece of flexible wire used to draw an electrical cable through a wall cavity. 

  • A chubby chaser. 

  • In the sport of Quidditch or Muggle quidditch, a player responsible for passing the quaffle and scoring goals with it. 

  • A tranny chaser. 

  • A chase gun. 

  • Any dragonfly of family Libellulidae. 

  • One of a series of adjacent light bulbs that cycle on and off to give the illusion of movement. 

  • A person who seeks partners with HIV in order to become infected. 

  • A person or thing (ship, plane, car, etc.) that chases. 

  • One who unhooks chokers from the logs at the landing. 

  • A tool used for cleaning out screw threads, either as an integral part of a tap or die to remove waste material produced by the cutting tool, or as a separate tool to repair damaged threads. 

  • Someone who chases (decorates) metal; a person who decorates metal by engraving or embossing. 

operator

noun
  • A member of a military special operations unit. 

  • A function or other mapping that carries variables defined on a domain into another variable or set of variables in a defined range. 

  • A telecommunications facilitator whose job is to establish temporary network connections. 

  • A kind of expression that enters into an a-bar movement dependency and is said to bind a variable. 

  • The administrator of a channel or network on IRC. 

  • A symbol that represents a construct in a programming language and differs from a normal function in its syntax. 

  • A person who is adept at making deals or getting results, especially one who uses questionable methods. 

  • The game of Chinese whispers. 

  • One who operates. 

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