Welcome to Yorkie Talk. Rufio definitely needs potty breaks during that 10 hours.
Consistency is key to establishing good house training. Whichever method you choose, he should have that option at all times. For instance, my boys are pad and outdoor trained. They have a pad available at all times, although they would prefer to go outdoors.
If you are going to use the litter box, let him have access to it 24 hours a day as an option, even if he has other options when you are home.
Good luck!
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