downcast vs suicidal

downcast

adj
  • Feeling despondent. 

  • Looking downwards. 

noun
  • A ventilating shaft down which the air passes in circulating through a mine. 

  • A cast from supertype to subtype. 

verb
  • To cast from supertype to subtype. 

  • To taunt; to reproach; to upbraid. 

suicidal

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. 

noun
  • Someone suicidal; someone likely to kill themselves. 

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