mutter vs screech

mutter

verb
  • To make a sound with a low, rumbling noise. 

  • To speak softly and incoherently, or with imperfect articulations. 

  • To utter words, especially complaints or angry expressions, indistinctly or with a low voice and lips partly closed; to say under one's breath. 

noun
  • A repressed or obscure utterance; an instance of muttering. 

  • Peas. 

screech

verb
  • To make such a sound. 

  • To travel very fast, as if making the sounds of brakes being released. 

noun
  • A form of home-made rye whiskey made from used oak rye barrels from a distillery. 

  • A high-pitched strident or piercing sound, such as that between a moving object and any surface. 

  • Newfoundland rum. 

  • A harsh, shrill cry, as of one in acute pain or in fright; a shriek; a scream. 

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