spicule vs stylograph

spicule

noun
  • A tiny glass flake formed during the manufacture of glass vials 

  • A needle-like mating structure found only in male nematodes. 

  • A sharp, needle-like piece. 

  • A small spike of flowers. 

  • A jet of matter ejected from the photosphere of the sun. 

  • Any of many needle-like crystalline structures that provide skeletal support in marine invertebrates like sponges. 

stylograph

noun
  • A fountain pen that has a thin hollow tube or needle instead of a nib, and which releases ink when pressed against the paper. 

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