in rags vs threadbare

in rags

prep
  • Very poor or lowly. 

  • Dressed in very old, torn clothes. 

threadbare

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

  • damaged or shabby 

  • wearing clothes of threadbare material 

  • banal or clichéd; trite or hackneyed 

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