mangy vs out at the heels

mangy

adj
  • Worn and squalid-looking; bedraggled or decrepit. 

  • Afflicted, or looking as if afflicted, with mange. 

out at the heels

adj
  • Shabby, or in a poor plight. 

  • Wearing stockings that are worn out. 

How often have the words mangy and out at the heels occurred in a corpus of books? (source: Google Ngram Viewer )