commandment vs requirement

commandment

noun
  • The offence of commanding or inducing another to violate the law. 

  • A divinely ordained command, especially one of the Ten Commandments. 

requirement

noun
  • A statement (in domain specific terms) which specifies a verifiable constraint on an implementation that it shall undeniably meet or (a) be deemed unacceptable, or (b) result in implementation failure, or (c) result in system failure. 

  • Something asked. 

  • A necessity or prerequisite; something required or obligatory. Its adpositions are generally of in relation to who or what has given it, on in relation to whom or what it is given to, and for in relation to what is required. 

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