napkin vs oilcloth

napkin

noun
  • A serviette; a (usually rectangular) piece of cloth or paper used at the table for wiping the mouth and hands for cleanliness while eating. 

  • A nappy (UK), a diaper (American). 

  • A small scarf worn on the head by Christian women (chiefly Roman Catholic and Eastern Orthodox) when entering a church, as a token of modesty. 

oilcloth

noun
  • A fabric or cloth treated on one side with a waterproof covering, especially one made from linseed oil etc.; used for flooring, tablecloths, kitchen shelves and sometimes furniture covering. 

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