functionality vs worth

functionality

noun
  • The ability to do a task, performance, or execution; a set of functions that something is able or equipped to perform. 

  • The presence of a functional group. 

  • In United States trademark law, the tendency of a product design to serve a function other than identification of the product, preventing that design from being protected as a trademark. 

worth

noun
  • Merit, excellence. 

  • Value. 

  • Wealth, fortune, riches, property, possessions. 

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

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 functionality and worth occurred in a corpus of books? (source: Google Ngram Viewer )