cotton wool vs wadding

cotton wool

noun
  • Raw fibers of cotton before being processed. 

  • Soft, absorbent cotton for medical or cosmetic use, protective padding, etc. 

wadding

noun
  • Soft, fibrous cotton or wool used to make a wad, or as a packaging material. 

  • Wads collectively. 

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