emollient vs plaster of Paris

emollient

noun
  • Something which softens or lubricates the skin; moisturizer. 

  • Anything soothing the mind, or that makes something more acceptable. 

adj
  • Moisturizing. 

  • Soothing or mollifying. 

plaster of Paris

noun
  • A hemihydrate of calcium sulfate, made by calcining gypsum, that hardens when moistened and allowed to dry; used to make casts, molds and sculpture. 

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