nondescript vs unnoble

nondescript

adj
  • Without distinguishing qualities or characteristics. 

noun
  • An unmarked police car. 

  • An undistinguished, unexceptional person or thing. 

  • A species or other type of creature that has not been previously described or identified. 

unnoble

adj
  • Not noble; ignoble; base. 

  • Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily. 

verb
  • To make (someone or something) no longer noble 

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