grist vs scintilla

grist

noun
  • A given size of rope, common grist being a rope three inches in circumference, with twenty yarns in each of the three strands. 

  • Grain that is to be ground in a mill. 

verb
  • To grind in a mill. 

scintilla

noun
  • A small spark or flash. 

  • A small or trace amount. 

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