detour vs variation

detour

noun
  • A diversion or deviation from one's original route. 

  • The diversion of the flow of execution for debugging or similar purposes. 

verb
  • To make a detour. 

  • To direct or send on a detour. 

variation

noun
  • Deviation from the mean orbit of a heavenly body. 

  • The act of varying; a partial change in the form, position, state, or qualities of a thing. 

  • The angular difference at the vessel between the direction of true north and magnetic north. 

  • A related but distinct thing. 

  • A line of play that differs from the original. 

  • The modification of a hereditary trait. 

  • A technique where material is repeated with alterations to the melody, harmony, rhythm, timbre, texture, counterpoint or orchestration; but with some invariant characteristic, e.g. a ground bass. 

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