down at heel vs grungy

down at heel

adj
  • Shabbily dressed, slovenly; impoverished; shabby, dilapidated. 

  • In poor condition, especially due to having worn heels; worn-out, shabby. 

grungy

adj
  • Dirty; shabby; in disrepair. 

  • Of or relating to grunge music. 

How often have the words down at heel and grungy occurred in a corpus of books? (source: Google Ngram Viewer )