sighing vs squall

sighing

noun
  • The utterance of a sigh. 

squall

noun
  • A loud cry or wail. 

  • A sudden storm, as found in a squall line. 

  • A squall line, multicell line, or part of a squall line. 

verb
  • To cry or wail loudly. 

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