nocturnal vs quotidian

nocturnal

noun
  • A device for telling the time at night, rather like a sundial but read according to the stars. 

  • A person or creature that is active at night. 

adj
  • Taking place at night, nightly. 

  • Primarily active during the night. 

quotidian

noun
  • Commonplace or mundane things regarded as a class. 

  • A daily allowance formerly paid to certain members of the clergy. 

adj
  • Having the characteristics of something which can be seen, experienced, etc, every day or very commonly; commonplace, ordinary, mundane. 

  • Recurring every twenty-four hours or (more generally) daily (of symptoms, etc). 

  • Happening every day; daily. 

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