My minecraft freezes up every 5-15 minutes, How to fix?

So recently my minecraft started freezing up. I start it up, join a minecraft server, then i play for about 10 minutes, it then freezes then says it stopped responding. I then have to close it and open it again. Having to go through that every 5-15 minutes is very annoying. Its only on one server though. If anyone knows how to fix it please tell me! 10 points for best explained answer!