(I don't now the exact numbers, maybe it is a bigger diffference from day to day.
But you can just take a look at your recent deposits. When your deposit from yesterday arrived at 5:35pm, your deposit today will arrive during x:35pm and x:40pm. I use "x" because it is every hour at daytime.
and an aditional note:
I was told that you can raise the deposit/withdraw limit again, even if you are tier 4. I did not know this before