mote vs speckle

mote

noun
  • A small particle; a speck. 

  • A tiny computer for remote sensing; a component element of smartdust. 

speckle

noun
  • A small spot or speck on the skin, plumage or foliage. 

  • Kind; sort. 

  • A cluster of interchromatin granules in a nucleus. 

  • The random distribution of light when it is scattered by a rough surface. 

verb
  • To mark with speckles. 

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