sufficient vs third string

sufficient

det
  • A quantity (of something) that is as large as is needed. 

  • An adequate quantity of; enough. 

adj
  • Possessing adequate talents or accomplishments; of competent power or ability; qualified; fit. 

  • Of a type or kind that suffices, that satisfies requirements or needs. 

third string

adj
  • Of a decidedly lower quality or condition. 

noun
  • A unit of players that plays behind the first and second strings; a junior varsity team. 

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