need vs worth

need

noun
  • A requirement for something; something needed. 

  • Lack of means of subsistence; poverty; indigence; destitution. 

verb
  • To be obliged or required (to do something). 

  • To be required; to be necessary. 

  • To want strongly; to feel that one must have something. 

  • To have an absolute requirement for. 

worth

noun
  • An amount that could be achieved or produced in a specified time. 

  • Value. 

  • Wealth, fortune, riches, property, possessions. 

  • Merit, excellence. 

adj
  • Deserving of. 

  • Having a value of; proper to be exchanged for. 

  • Making a fair equivalent of, repaying or compensating. 

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