gloomy vs suicidal

gloomy

noun
  • Someone or something that is gloomy or pessimistic. 

adj
  • Suffering from gloom; melancholy; dejected. 

  • Not very illuminated; dim because of darkness, especially when appearing depressing or frightening. 

suicidal

noun
  • Someone suicidal; someone likely to kill themselves. 

adj
  • Likely to commit, or to attempt to commit, suicide. 

  • Extremely reckless. 

  • Highly likely to certain to result in the deaths of the participants; dangerous or reckless to such a degree as to be tantamount to suicide for those taking part. 

  • Pertaining to suicide. 

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