libel vs upgrade

libel

verb
  • To proceed against (goods, a ship, etc.) by filing a libel claim. 

  • To defame (someone), especially in a manner that meets the legal definition of libel. 

noun
  • The act or tort of displaying such a statement publicly. 

  • Any defamatory writing; a lampoon; a satire. 

  • A written declaration or statement by the plaintiff of their cause of action, and of the relief they seek. 

  • A brief writing of any kind, especially a declaration, bill, certificate, request, supplication, etc. 

  • A written or pictorial false statement which unjustly seeks to damage someone's reputation. 

upgrade

noun
  • An upward grade or slope. 

  • An improvement 

  • An improved component or replacement item, usually applied to technology 

verb
  • To improve, usually applied to technology, generally by complete replacement of one or more components 

  • To replace with something better. 

  • To improve the equipment or furnishings of or services rendered to 

  • To replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name. 

  • To improve in condition or status. 

adv
  • Up a slope or grade. 

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