lambskin vs paraffin paper

lambskin

noun
  • The skin of a very young sheep, especially prepared with the fleece still attached. A very fine form of leather. 

  • A kind of woollen cloth resembling this. 

paraffin paper

noun
  • wax paper 

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