shrink away vs tremble

shrink away

verb

  • to draw back in fear; cringe, back down, shy away 

tremble

verb

  • To fear; to be afraid. 

  • To shake, quiver, or vibrate. 

noun

  • A shake, quiver, or vibration. 

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