ergotism vs rationale

ergotism

noun
  • A logical deduction. 

  • The usage of ergot infested grain to poison animals. 

  • The effect of long-term ergot poisoning, traditionally due to the ingestion of the alkaloids produced by the fungus Claviceps purpurea which infects rye and other cereals, and more recently by the action of a number of ergoline-based drugs, consisting of convulsive and gangrenous symptoms. 

  • The plant disease caused by ergot. 

rationale

noun
  • A justification or rationalization for something. 

  • An explanation of the basis or fundamental reasons for something. 

  • A liturgical vestment worn by some Christian bishops of various denominations. 

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