credence vs theory

credence

noun
  • A subjective probability estimate of a belief or claim. 

  • Acceptance of a belief or claim as true, especially on the basis of evidence. 

  • Credential or supporting material for a person or claim. 

  • A small table or credenza used in certain Christian religious services. 

  • A cupboard, sideboard, or cabinet, particularly one intended for the display of rich vessels or plate on open shelves. 

theory

noun
  • A hypothesis or conjecture. 

  • A coherent statement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed, or which sets out the laws and principles of something known or observed; a hypothesis confirmed by observation, experiment etc. 

  • A field of study attempting to exhaustively describe a particular class of constructs. 

  • A set of axioms together with all statements derivable from them; or, a set of statements which are deductively closed. Equivalently, a formal language plus a set of axioms (from which can then be derived theorems). The statements may be required to all be bound (i.e., to have no free variables). 

  • A description of an event or system that is considered to be accurate. 

  • The underlying principles or methods of a given technical skill, art etc., as opposed to its practice. 

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