tremble vs wamble

tremble

verb
  • To shake, quiver, or vibrate. 

  • To fear; to be afraid. 

noun
  • A shake, quiver, or vibration. 

wamble

verb
  • To twist and turn; to wriggle; to roll over. 

  • To feel nauseous, to churn (of stomach). 

  • To wobble, to totter, to waver; to walk with an unsteady gait. 

noun
  • An unsteady walk; a staggering or wobbling. 

  • A rumble of the stomach. 

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