decidable vs orderly

decidable

adj
  • capable of being decided. 

  • in intuitionistic logic, a proposition P is decidable in a given theory if it can be proven from the theory that "either P or not P", i.e. in symbols: P∨¬P. 

  • describing a set for which there exists an algorithm that will determine whether any element is or is not within the set in a finite amount of time. 

orderly

adj
  • Neat and tidy; possessing order. 

  • Being on duty; keeping order; conveying orders. 

  • Methodical or systematic. 

  • Peaceful; well-behaved. 

noun
  • A hospital attendant given a variety of non-medical duties. 

  • A soldier who carries out minor tasks for a superior officer. 

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