I'm looking for a plugin that tracks how many printing hours since the last time I changed my nozzle. That is, whenever I change the nozzle, I manually tell the plugin to reset the timer. After a specified number of printing hours, the plugin will give me a warning that it's been X hours since I last changed the nozzle and maybe I need to change it again.
Obviously, the plugin can be used to track the number of hours since any event.