eject vs sign on

eject

verb
  • To compel (a person or persons) to leave. 

  • To cause (something) to come out of a machine. 

  • To forcefully project oneself or another occupant from an aircraft (or, rarely, another type of vehicle), typically using an ejection seat or escape capsule. 

  • To come out of a machine. 

  • To compel (a sports player) to leave the field because of inappropriate behaviour. 

  • To throw out or remove forcefully. 

noun
  • an inferred object of someone else's consciousness 

sign on

noun
  • The time of day when a radio or television station begins broadcasting, usually after being off the air for several hours. 

verb
  • To begin broadcasting a radio or television signal, usually at the beginning of a broadcasting day and after being off the air for several hours. 

  • To commit oneself, as to a project, a goal, an organization, a cause. 

  • To join something, after signing. 

  • To apply to receive unemployment benefits. 

  • To log on; to start using a computer, radio, etc., or to start talking. 

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