proper right vs right side

proper right

noun
  • The direction which is to the right from an object's perspective, the direction 90 degrees clockwise from the front. 

right side

noun
  • Used other than figuratively or idiomatically: see right, side. 

  • The side of a fabric, often with a more visible color or pattern, that is intended to face outward on a finished project. 

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