contact lens vs mirror

contact lens

noun
  • A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically. 

mirror

noun
  • A smooth surface, usually made of glass with reflective material painted on the underside, that reflects light so as to give an image of what is in front of it. 

  • An object, person, or event that reflects or gives a picture of another. 

  • A disk, website or other resource that contains replicated data. 

  • A mirror carp. 

  • A kind of political self-help book, advising kings, princes, etc. on how to behave. 

verb
  • Of an event, activity, behaviour, etc, to be identical to; to be a copy of. 

  • To reflect, as in a mirror. 

  • To create something identical to (a web site, etc.). 

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