Usually to a local pizza restaurant or somewhere like Carluccios as a family at the end of every term and the same for birthdays, so that's 7 times for the four of us. DH and I might eat out about twice a year - in fact we are going out the week after next - to celebrate the 23rd anniversary of our first date and now that restaurant has shut, we go to the one over the road
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About four times a year we get taken out to very posh places by DH's clients - think the Ivy, etc., which we both find quite tedious and DH always says on the way home - you're a better cook anyway!
On holiday we usually eat out about half a dozen times and always try to chose one really nice restaurant.
DD and I might have supper out if DH and DS are away/out - may be about once every six weeks.
Am very naughty when dd and I are shopping - we nearly always have something in a coffee shop.
Don't feel we go out very much but when I write it down it all adds up
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Add in the suppers at friends - probably 8-10 and year and the return trips here - probably about 6 times a year and it really does seem quite a lot 
We don't do takeaways though.