Found...
The below interesting, it's relating to washer capacities and how many loads of laundry on average a person would be expected to produce.
In relation to washer capacities - I believe this will have the biggest impact on how many loads a week are needed.
Then there are obvious things like how many clothes are worn, how often washed and separating habits - as they're individual, example; although most sources tell you not to run a load of just towels, I won't wash towels with anything else, as it accelerates wear on other fabrics.
Going back to capacities, as I have mentioned on AW a few times. The capacity/volume of washing machines has always struck me as a bit of a farce - it really does vary from manufacturer to manufacturer; example; the 8KG Hoover and 8KG Bosch washing machines that I had - the drums were nothing alike (Hoovers tall and shallow, Bosch stubby and deep).
Also, a standard UK double hollow fibre duvet (comforter) would fill the Bosch drum, but in weight, that doesn't come anywhere near 8KG. It wouldn't have even fit in the Hoover.
The bedding I have now (microfibre cluster) wouldn't have even fit in my 12kg LG, but again does not weigh 12kg.
And as I'm sure most know, the way the weight/capacity ratings are graded are the biggest farce of all.