sough vs tremble

sough

verb
  • To make a soft rustling or murmuring sound. 

  • To drain. 

noun
  • A gentle breeze; a waft; a breath. 

  • A murmuring sound; rushing, rustling, or whistling sound. 

  • A (deep) sigh. 

  • A small drain; an adit. 

tremble

verb
  • To shake, quiver, or vibrate. 

  • To fear; to be afraid. 

noun
  • A shake, quiver, or vibration. 

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