disadvantage vs functionality

disadvantage

verb
  • To place at a disadvantage. 

noun
  • A setback or handicap. 

  • A weakness or undesirable characteristic; a con. 

  • Loss; detriment; hindrance. 

functionality

noun
  • The presence of a functional group. 

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

  • 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. 

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