plaster vs sheet protector

plaster

noun
  • A small adhesive bandage to cover a minor wound; a sticking plaster. 

  • A mixture of lime or gypsum, sand, and water, sometimes with the addition of fibres, that hardens to a smooth solid and is used for coating walls and ceilings; render, stucco. 

  • plaster of Paris. 

  • A cast made of plaster of Paris and gauze; a plaster cast. 

  • A paste applied to the skin for healing or cosmetic purposes. 

verb
  • To smooth over. 

  • To apply a plaster to. 

  • To cover or coat something with plaster; to render. 

  • To smear with some viscous or liquid substance. 

  • To bombard heavily or overwhelmingly; to overwhelm with (weapons) fire. 

  • To hide or cover up, as if with plaster; to cover thickly. 

sheet protector

noun
  • A clear plastic sleeve for documents. 

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