boost vs libel

boost

noun
  • Something that helps, or adds power or effectiveness; assistance. 

  • A positive intake manifold pressure in cars with turbochargers or superchargers. 

  • A coordinate transformation that changes velocity. 

  • A push from behind, as to one who is endeavoring to climb. 

verb
  • To lift or push from behind (one who is endeavoring to climb); to push up. 

  • To steal. 

  • To give a booster shot to. 

  • To help or encourage (something) to increase or improve; to assist in overcoming obstacles. 

  • To amplify; to signal boost. 

  • To jump-start a vehicle by using cables to connect the battery in a running vehicle to the battery in a vehicle that won't start. 

libel

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

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

  • Any defamatory writing; a lampoon; a satire. 

  • 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. 

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. 

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