categorical vs dead calm

categorical

adj
  • Absolute; having no exception. 

  • Of, pertaining to, or using a category or categories. 

noun
  • A categorical proposition. 

dead calm

adj
  • Completely still with no waves and no wind. 

noun
  • The condition of a perfectly flat sea with no waves and no wind. 

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