Your pup needs to go out at least every hour, and most likely times for toileting are before or after play/sleep/eating or when excited. At this age, training is all about conditioning rather than rules and regulations so when he/she toilets outside, remember to give LOTS of praise, let them know what is the right behaviour. I don't really know why I'm giving you advice though, as my 10 week old pup has piddled on the floor three times today already!!! She's usually so good too...