law vs should

law

verb
  • To prosecute or sue (someone), to litigate. 

  • To rule over (with a certain effect) by law; to govern. 

  • To enforce the law. 

  • To subject to legal restrictions. 

noun
  • Any statement of the relation of acts and conditions to their consequences. 

  • A person or group that act(s) with authority to uphold such rules and order (for example, one or more police officers). 

  • The body of such rules that pertain to a particular topic. 

  • A mode of operation of the flight controls of a fly-by-wire aircraft. 

  • The body of binding rules and regulations, customs, and standards established in a community by its legislative and judicial authorities. 

  • The profession that deals with such rules (as lawyers, judges, police officers, etc). 

  • Common law, as contrasted with equity. 

  • Jurisprudence, the field of knowledge which encompasses these rules. 

  • One of two metaphysical forces ruling the world in some fantasy settings, also called order, and opposed to chaos. 

  • Litigation; legal action (as a means of maintaining or restoring order, redressing wrongs, etc). 

  • A rule or principle regarding the construction of language or art. 

  • An allowance of distance or time (a head start) given to a weaker (human or animal) competitor in a race, to make the race more fair. 

  • Any rule that must or should be obeyed, concerning behaviours and their consequences. (Compare mores.) 

  • A statement (in physics, etc) of an (observed, established) order or sequence or relationship of phenomena which is invariable under certain conditions. (Compare theory.) 

  • A statement (of relation) that is true under specified conditions; a mathematical or logical rule. 

  • A binding regulation or custom established in a community in this way. 

  • The control and order brought about by the observance of such rules. 

  • One of the official rules of cricket as codified by the its (former) governing body, the MCC. 

  • An oath sworn before a court, especially disclaiming a debt. (Chiefly in the phrases "wager of law", "wage one's law", "perform one's law", "lose one's law".) 

  • A sound law; a regular change in the pronunciation of a language. 

should

verb
  • Used to form a variant of the present subjunctive, expressing a state or action that is hypothetical, potential, mandated, etc. 

  • Will be likely to (become or do something); indicates a degree of possibility or probability that the stated thing will happen or be true in the future. 

  • Indicates that something is expected to have happened or to be the case now. 

  • Used to express a conditional outcome. 

  • With verbs such as 'see' or 'hear', usually in the second person, used to point out something remarkable in either a good or bad way. 

  • To make a statement of what ought to be true, as opposed to reality. 

  • Used to impart a tentative, conjectural or polite nuance. 

  • Used to express what the speaker would do in another person's situation, as a means of giving a suggestion or recommendation. 

  • Simple past tense of shall. 

  • In questions, asks what is correct, proper, desirable, etc. 

  • Used to issue an instruction (traditionally seen as carrying less force of authority than alternatives such as 'shall' or 'must'). 

  • Used to give advice or opinion that an action is, or would have been, beneficial or desirable. 

noun
  • Something that ought to be the case as opposed to already being the case. 

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