shriek vs squeal

shriek

verb
  • To utter a loud, sharp, shrill sound or cry, as do some birds and beasts; to scream, as in a sudden fright, in horror or anguish. 

  • To utter sharply and shrilly; to utter in or with a shriek or shrieks. 

noun
  • An exclamation mark. 

  • A sharp, shrill outcry or scream; a shrill wild cry such as is caused by sudden or extreme terror, pain, or the like. 

squeal

verb
  • To scream with a shrill, prolonged sound. 

  • To make a squealing noise. 

  • 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. 

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