remove vs sign on

remove

verb
  • To discard, set aside, especially something abstract (a thought, feeling, etc.). 

  • To murder. 

  • To dismiss or discharge from office. 

  • To move something or someone from one place to another, especially to take away. 

  • To dismiss a batsman. 

  • To delete. 

noun
  • Distance in time or space; interval. 

  • A step or gradation (as in the phrase "at one remove") 

  • (at some public schools) A division of the school, especially the form prior to last 

  • Emotional distance or indifference. 

  • The act of resetting a horse's shoe. 

  • The act of removing something. 

  • A dish served to replace an earlier one during a meal; a part of a new course. 

sign on

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

  • 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 join something, after signing. 

  • To apply to receive unemployment benefits. 

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

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

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