floccus vs wool

floccus

noun
  • A flock or tuft of wool or wool-like hairs; the downy plumage of unfledged birds. 

  • A cloud species which consists of rounded tufts of cloud, often formed by dissipation from larger cloud species. Associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera. 

wool

noun
  • The hair of the sheep, llama and some other ruminants. 

  • Anything with a texture like that of wool. 

  • Yarn, including that made from synthetic fibers. 

  • A cloth or yarn made from the wool of sheep. 

  • A fine fiber obtained from the leaves of certain trees, such as firs and pines. 

  • A resident of a satellite town outside Liverpool, such as St Helens or Warrington. See also Yonner. 

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