floccule vs pappus

floccule

noun
  • A small, loosely aggregated mass of material suspended in, or precipitated from a solution; a floc. 

pappus

noun
  • The first hair on the chin. 

  • The markedly reduced sepals of an Asteraceae floret that take the form of trichomes or scale attached to the ovary or seed. 

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