clockwork vs regularity

clockwork

noun
  • A mechanism powered by a coiled spring and regulated by some form of escapement; the power is transmitted through toothed gearwheels and used to drive a mechanical clock, toy, or other device. 

  • The action of behaving mechanically in the manner of a clock. 

adj
  • Very smooth and regular. 

  • Driven by clockwork. 

regularity

noun
  • The condition or quality of being regular 

  • A particular regular occurrence 

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