decrepitate vs sputter

decrepitate

verb
  • Of salts and minerals, to crackle when heated, indicating a sudden breakdown of their particles. 

  • To roast (a salt or mineral) until it stops crackling in the fire. 

sputter

verb
  • To cause surface atoms or electrons of a solid to be ejected by bombarding it with heavy atoms or ions. 

  • To emit saliva or spit from the mouth in small, scattered portions, as in rapid speaking. 

  • To coat the surface of an object by sputtering. 

  • To speak so rapidly as to emit saliva; to utter words hastily and indistinctly, with a spluttering sound, as in rage. 

  • To throw out anything, as little jets of steam, with a noise like that made by one sputtering. 

noun
  • Moist matter thrown out in small detached particles. 

  • Confused and hasty speech. 

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