squeal vs tremble

squeal

verb
  • To make a squealing noise. 

  • To scream with a shrill, prolonged sound. 

  • To give sensitive information about someone to a third party; to rat on someone. 

noun
  • A high-pitched sound, such as the scream of a child or a female person, or noisy worn-down brake pads. 

  • The cry of a pig. 

tremble

verb
  • To shake, quiver, or vibrate. 

  • To fear; to be afraid. 

noun
  • A shake, quiver, or vibration. 

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