timekeeper vs wristwatch

timekeeper

noun
  • A device that shows the time; a timepiece. 

  • A person (or something controlled by a person) that is or isn't punctual. 

  • A person who keeps records of the hours of attendance of employees. 

  • A person who records the time elapsed in a sporting event. 

wristwatch

noun
  • A watch that is worn on a strap or band fastened around the wrist 

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