nocturnal vs routine

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. 

routine

noun
  • A course of action to be followed regularly; a standard procedure. 

  • A set piece of an entertainer's act. 

  • A set of normal procedures, often performed mechanically. 

  • A set of instructions designed to perform a specific task; a subroutine. 

adj
  • Ordinary with nothing to distinguish it from all the others. 

  • According to established procedure. 

  • Regular; habitual. 

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