consequent vs efficient

consequent

adj
  • Following as a result, inference, or natural effect. 

  • Of or pertaining to consequences. 

  • Of a stream, having a course determined by the slope it formed on. 

noun
  • An event which follows another. 

  • The second term of a ratio, i.e. the term b in the ratio a:b, the other being the antecedent. 

  • A consequent stream. 

  • The second half of a hypothetical proposition; Q, if the form of the proposition is "If P, then Q." 

efficient

adj
  • causing effects, producing results; bringing into being; initiating change (rare except in philosophical and legal expression efficient cause = causative factor or agent) 

  • expressing the proportion of consumed energy that was successfully used in a process; the ratio of useful output to total input 

  • making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy 

  • effective, efficacious 

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