tremble vs welter

tremble

noun
  • A shake, quiver, or vibration. 

verb
  • To shake, quiver, or vibrate. 

  • To fear; to be afraid. 

welter

noun
  • A tossing or rolling about. 

  • A general confusion or muddle, especially of a large number of items. 

adj
  • Heavyweight. 

verb
  • To roll around; to wallow. 

  • To wither; to wilt. 

  • To rise and fall, to tumble over, to roll. 

  • To revel, luxuriate. 

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