Above is a very good guide line.
I instruct for one day at weekend.
During the summer with no cancellations I have almost touched 7 hours flying. But during the winter and especially around christmas I have got through a hole month without a single hour but generally it will be about 1-2 hours per day. As this is not my main souce of income I dont care about the lack of hours during the winter as I enjoy the break, knowing (hopefully) it will pick up in the spring.
All the best
mint