mousy vs umbrous

mousy

adj
  • Of a greyish-brown colour. 

  • Abounding in or infested with mice. 

  • mousy 

  • Timid. 

  • Quiet; stealthy. 

umbrous

adj
  • Of an umber colour. 

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