For example, I have a plugin that stores player's played time in seconds. How do I make a message appear to the player every 2 hours? I don't mean every 2 hours of the global server time, I mean his time.. the player's time. If he just joined, and plays for 2 hours, a message appears (client_print, doesn't matter), then he takes a break... next day he joins again and his time is 2 hours, because he spent two hours yesterday and left, then he plays another 2 hours and the message appears again...