Well over a 100 at a guess ... Germany, Scandinavia, Canada, North America, a few times in Scotland.
Usually in a vehicle with the correct tyres/transmission for the conditions, and the only serious cock-up I made was in Canada when on a call out I was duty driver for the crew and was in a tad of a hurry .. completely forgot about the sump heater, dropped it into reverse and this very long piece of cable started to unattach itself from the fence !! Luckily it didn't break anything but the clips .. so was able to disconnect and continue .. did cost me a few beers later on however ..

One of the more interesting drives was near Bodo .... Landie was handling the conditions really well , but came round a corner to see a snowplough coming the other way had got stuck in the middle of the road... and I mean stuck ... to continue the journey we actually went back up the road, found a gate, into the fields, cross country for a couple of miles then rejoined the road .... that was on full studded snow tyres however .. and it was -15 C .. so no slush just hard dry snow.
UK conditions are the worst to drive in IMHO .. wet slushy snow at around 0 C ... give me much colder stuff any day ..it just works better.