I'm sorry - I know a lot about expressing and there is no way you could go that long between expressing when the baby is that age.
Just the same as breast-feeding. No breast feeding mother would not feed their 6 week old for hours during the day.
The most you can go between expressing at that time without risking supply issues is 3 hours max. And I was unusually lucky in that I could express unusually large amounts quickly so didn't have the soul destroying experience of having to express for 45 minutes to get 100mls of milk which is the experience of the majority of women and hence why exclusive expresing is so rare.
I kept a diary of all the times I expressed and amounts because I am anal to keep an eye on supply which I actually handed over to the La Leche league and our local midwifery team at their request (as well as being interviewed by lots of local infant feeding specialists) as there is very little support for women (in the UK - it is more common in the U.S. where people return to work more quickly - although it's still unusual to exclusively express) who do exclusively express and very little actual collected data.
That said, I have stated in my posts what I believe is the "likelihood" is of the DofC's feeding methods based on what is most statistically likely rather than making bald statements that she is definitely breast feeding.
Re: being tired, the number and type of staff whom are employed is a matter of fact (accepted by Clarence House). Again, the more assistance that a parent has allows them the opportunity to have more rest and flexibility etc. That is just common sense - whatever the age of the parent
You're clearly a big fan of the DofC and I accept that. But what I will question (and correct) is when you make absolute statements without any fact (eg the breastfeeding point) and sweeping generalisations, such as insinuating that I am you get than the DofC