disconnect vs work in

disconnect

verb
  • To remove the connection between an appliance and an electrical power source. 

  • To sever or interrupt a connection. 

  • Of a person, to become detached or withdrawn. 

noun
  • A switch used to isolate a portion of an electrical circuit. 

  • A lack of connection or accord; a mismatch. 

  • The deliberate severing of ties with family, friends, etc. considered antagonistic towards Scientology. 

  • A break or interruption in an existing connection, continuum, or process; disconnection. 

work in

verb
  • To work out using a machine in between the sets of someone who is already using that machine. 

  • To find time or space for, amid other things. 

  • Used other than figuratively or idiomatically: see work, in. 

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