TakeABreak

This plugin forces players who are not OP to have a 20 second break from playing every 1 hour of playtime. It is very simple. Just drop it into the plugins folder and it will work with no setup. It forces players to take a break by freezing them using the Simple Player Freeze plugin.
Simple Player Freeze plugin is a dependency.
Any plugin that has a command /freeze and /unfreeze will work Simple Player Freeze is tested and works.
The plugin is displayed as being compatible with bukkit and spigot and it uses the bukkit api, however simple player freeze is only supported with paper therefore to use on bukkit or spigot you must find an alternative plugin.