Will I get a question each day for each one of my journals?

Let's say you have three journals (all of them have questions turned on) and your question frequency is set to "once per day" — this would mean that you will receive one question in total each day so the on Monday is may be about journal A but on Tuesday it's journal B.

You receive one question per day, not one question per child, per day.

Using the same example as above, if you have 3 journals and your question frequency is on "once per day", your week may look like this: