blinkers vs pair of specs

blinkers

noun
  • A kind of goggles, used to protect the eyes from glare, dust, etc. 

  • Spectacles. 

  • A pair of leather or rubber eye cups attached to a horse hood in order to impede the rear vision of racehorses and harness horses; blinders in (USA). 

pair of specs

noun
  • A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face. 

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