deteriorated vs threadbare

deteriorated

adj
  • in a state of impaired quality or value 

threadbare

adj
  • damaged or shabby 

  • shabby, frayed and worn to an extent that warp threads show 

  • wearing clothes of threadbare material 

  • banal or clichéd; trite or hackneyed 

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