Bubonic Plague
The Bubonic Plague and a clock can be easily related. A clock moves
over time and keeps track of time. The Plague infects people and shows
them getting worse over time. So they both have the common ability to
tell time. The Bubonic plague would slowly make people look worse.
They would start out fine but then gradually start to look like poop. At
first the lymph nodes would be fine but then they would grow to huge
sizes. This way u can tell how long some one had had the plague, just like
a clock.