counterfactual vs derivative

counterfactual

adj
  • Contrary to known or agreed facts; untrue. 

  • Of or in comparison to a hypothetical state of the world. 

noun
  • A conditional statement in which the conditional clause is false. 

  • A claim, hypothesis, or other belief that is contrary to the facts. 

  • A hypothetical state of the world, used to assess the impact of an action. 

derivative

adj
  • Lacking originality. 

  • Having a value that depends on an underlying asset of variable value. 

  • Imitative of the work of someone else. 

  • Obtained by derivation; not radical, original, or fundamental. 

  • Referring to a work, such as a translation or adaptation, based on another work that may be subject to copyright restrictions. 

noun
  • A financial instrument whose value depends on the valuation of an underlying asset; such as a warrant, an option etc. 

  • A word that derives from another one. 

  • The value of such a derived function for a given value of its independent variable: the rate of change of a function at a point in its domain. 

  • The linear operator that maps functions to their derived functions, usually written D; the simplest differential operator. 

  • Something derived. 

  • Any of several related generalizations of the derivative: the directional derivative, partial derivative, Fréchet derivative, functional derivative, etc. 

  • A chemical derived from another. 

  • The derived function of f(x): the function giving the instantaneous rate of change of f; equivalently, the function giving the slope of the line tangent to the graph of f. Written f'(x) or (df)/(dx) in Leibniz's notation, ̇f(x) in Newton's notation (the latter used particularly when the independent variable is time). 

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