dingy vs institutional

dingy

adj
  • shabby, squalid, uncared-for 

  • dark, dull 

institutional

adj
  • Elementary; rudimentary. 

  • Of, pertaining to, characteristic of, or organized along the lines of an institution. 

  • Arising from the practice of an institution. 

  • Instituted by authority. 

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