knife vs tickler

knife

noun
  • A weapon designed with the aforementioned specifications intended for slashing and/or stabbing and too short to be called a sword. A dagger. 

  • A utensil or a tool designed for cutting, consisting of a flat piece of hard material, usually steel or other metal (the blade), usually sharpened on one edge, attached to a handle. The blade may be pointed for piercing. 

  • Any blade-like part in a tool or a machine designed for cutting, such as that of a chipper. 

verb
  • To betray, especially in the context of a political slate. 

  • To positively ignore, especially in order to denigrate; compare cut. 

  • To cut with a knife. 

  • To use a knife to injure or kill by stabbing, slashing, or otherwise using the sharp edge of the knife as a weapon. 

  • To cut through as if with a knife. 

tickler

noun
  • A tickler file, file cabinet, or similar containing memoranda of deadlines arranged in date order. 

  • Something puzzling; a poser. 

  • A reminder. 

  • One who tickles. 

  • A person who or thing which amuses or excites. 

  • A latex condom that has additional protrusions, for enhancing the sexual pleasure of the user. 

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