circumstantial vs deficient

circumstantial

adj
  • Pertaining to or dependent on circumstances, especially as opposed to essentials; incidental, not essential. 

  • Suggesting guilt, but not proving it conclusively. 

  • Abounding with minor circumstances; in great detail; particular. 

  • Full of circumstance or pomp; ceremonial. 

noun
  • Something incidental to the main subject, but of less importance. 

deficient

adj
  • Lacking something essential; often construed with in. 

  • Insufficient or inadequate in amount. 

  • Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n). 

noun
  • A person who is deficient. 

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