floc vs floccule

floc

noun
  • A floccule; a soft or fluffy particle suspended in a liquid, or the fluffy mass of suspended particles so formed. 

floccule

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

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