scalping vs suicidal

scalping

noun
  • The action by which someone is scalped. 

  • A legitimate method of arbitrage of small price gaps created by the bid-ask spread. 

  • A fraudulent form of market manipulation in which a person buys shares immediately before recommending the shares to others, thus driving the price up. 

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 scalping and suicidal occurred in a corpus of books? (source: Google Ngram Viewer )