calico vs cotton wool

calico

noun
  • A kind of rough cloth made from unbleached and not fully processed cotton, often printed with a bright pattern. 

  • The plant disease caused by Tobacco mosaic virus. 

adj
  • Made of calico or resembling the color of calico cloth, having a pattern of red and contrasting areas; variegated. 

cotton wool

noun
  • Raw fibers of cotton before being processed. 

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

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