Distance between breaks

How far do you all tend to go before you take a break when riding? I typically don't take breaks and my longer rides tend to be in the 25 to 35 mile range. But, I recently started riding with my 13 year old daughter and she likes to take breaks, have some water and talk a little bit and back down the road she goes. Turns out that while I don't need the breaks physically I am enjoying them and the rides are much easier (partly because we are also riding slower than my typical pace). I am going to try adding them to my longer rides and hopefully those rides will be able to get even longer. So... I am interested in how you all take breaks while riding.