demand vs want

demand

verb
  • To require of someone. 

  • To claim a right to something. 

  • To ask forcefully for information. 

  • To request forcefully. 

  • To issue a summons to court. 

noun
  • An urgent request. 

  • The desire to purchase goods and services. 

  • An order. 

  • The amount of a good or service that consumers are willing to buy at a particular price. 

  • A forceful claim for something. 

  • A requirement. 

  • More precisely peak demand or peak load, a measure of the maximum power load of a utility's customer over a short period of time; the power load integrated over a specified time interval. 

want

verb
  • To lack and be in need of or require (something, such as a noun or verbal noun). 

  • To make it easy or tempting to do something undesirable, or to make it hard or challenging to refrain from doing it. 

  • To desire (to experience desire); to wish. 

  • To be advised to do something (compare should, ought). 

  • To wish for or desire (something); to feel a need or desire for; to crave or demand. 

  • To wish, desire, or demand to see, have the presence of or do business with. 

noun
  • A desire, wish, longing. 

  • Poverty. 

  • Something needed or desired; a thing of which the loss is felt. 

  • A depression in coal strata, hollowed out before the subsequent deposition took place. 

  • Lack, absence, deficiency. 

  • A mole (Talpa europea). 

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