I think most people these days buy integrated fridge-freezers; mine is this one, or one very like it. The other common set-up (particularly for those who do a lot of freezing) is a "larder fridge" (non-freezer fridge) like the one in the other link (or a fridge with a very small freezer compartment, basically good only for ice cubes), plus a separate freezer, often a chest freezer. Chest freezers are very much "backing store" and might not even be in the kitchen: my parents kept theirs in the garage.

Side-by-side integrated fridge-freezers are AFAICT a more recent development, the concept, and often the actual appliances, having been imported from the US.

Peter