How often do you....

Fridge - whenever it looks like it needs a wipe
Freezer - frost free
Kitchen doors - quick wipe down when I notice they need it. I take everything out of the cupboards and give everything a good clean once a year
Oven - I spray Mr Muscle oven cleaner on overnight once a week, then give it a quick wipe and a rinse the next morning. I use Hob Bright on the ceramic hob the same day (but just wipe it over the rest of the time).
Windows and window frames - we're renovating the house, so as we've finished each room I give each window a good clean and polish. Will probably clean them once a year (the outside gets done by the window cleaner appx every 6 weeks.)
Door frames and light fittings (and skirting boards) get a quick dust once a week.

Generally I reckon that if you keep on top of it you don't need to spend much time on it.

Fridge - Wipe it inside every couple of weeks, clean it thoroughly when it looks grubby.

Freezer - when I struggle to get things in/out because its too frosty.

Kitchen cupboards - Outside I wash down weekly/twice weekly. Inside - when it looks grubby or there has been a spillage. The tops and underneath - every 2/3 months.

Windows and frames - I dust the frames once a week when I do the dusting likewise top of doors and frames. I dust the glass fortnightly and clean them properly every two months.

Hob gets washed daily and oven, only when something gets spilt.

I have enjoyed this thread so much! Kept giggling to myself when I was reading it. Apart from Judi, I think I am similar to most of you and I'm glad you aren't all perfect.
I clean about the same as most of you, except for the outside of my kitchen cupboard doors which I pride myself on wiping down about once a week.
I keep any decent screw top plastic jobs for storing stuff in, like an empty hot choc container. Handy for things like lentils which come in bags that easily split when you open them. I grind my own spices (try it folks, you won't believe the difference) so tend to keep any small glass jars for this. I certainly wouldn't go buying containers especially, unless I see them very cheap at a car boot. For example, I got an empty celebrations chocs container at a car boot for 10p. One of those tall cylindrical things. It is perfect for packets of spaghetti.
Any plastic packet that I use half of, I fold over and sticky tape shut as I know I only have to close and reopen it once more. Other packets I close with wooden clothes pegs.
Oh, after watching a KM video thing, I put all my wee opened spice/flavouring packets etc into a see through plastic ziplock type bag which had kiwi fruit in before. Now they aren't cluttering the cupboard and threatening to spill everywhere because they all sit happily upright in the bag.

I'm the opposite of OCD. I cleaned the top of mine for the first time in years and believe me, I put old wallpaper on top so I never have to do that again. It was horrible. Clingfilm would be more difficult I think as it wouldn't stay there independently the way that heavy wallpaper does.

I used to have a neighbour (elderly) who asked me how often I washed the floors and paintwork. I thought she meant the kitchen lino, but she, according to her hubby, used to take up her carpets once a month and clean the floor underneath and cleaned her paintwork at least once a month. It made me think how overboard you can go with cleaning.

My fridge gets cleaned when it's dirty - ditto everything else - probably once a year unless we have a spillage.