pedal vs tickle

pedal

noun
  • A stirrup. 

  • The ranks of pipes played from the pedal-board of an organ. 

  • an orthopedic structure or a footlike part. 

  • An effects unit, especially one designed to be activated by being stepped on. 

  • A lever operated by one's foot that is used to control or power a machine or mechanism, such as a bicycle or piano 

verb
  • To operate a pedal attached to a wheel in a continuous circular motion. 

  • To operate a bicycle. 

adj
  • Of or relating to the foot. 

tickle

noun
  • A light tap of the ball. 

  • The act of tickling. 

  • An itchy feeling resembling the result of tickling. 

  • A narrow strait. 

verb
  • To appeal to someone's taste, curiosity etc. 

  • To unexpectedly touch or stroke delicately in a manner which causes displeasure or withdrawal. 

  • To catch fish in the hand (usually in rivers or smaller streams) by manually stimulating the fins. 

  • To touch repeatedly or stroke delicately in a manner which causes laughter, pleasure and twitching. 

  • To cause delight or amusement in. 

  • To feel titillation. 

  • To feel as if the body part in question is being tickled. 

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