All the suggested methods for withdrawals are likely. It's what works for the individual, and their unique account setups.
I have an inherited IRA, so that means I have to take a minimum distribution each year. Set it up to do so each May, which is completely arbitrary time. It could have been any month of the year, but May works for me.
I also have a sizeable (like half my portfolio) taxable account that throws off cap gains and dividends in April (small amount) and December (big ass amount). Since I'm having to count those cap gains and dividends in my income anyway, I stopped reinvesting my taxable and take the gains/dividends as cash and throw it into my savings account to cover expenses.
So I have money coming in April/May and December. That right there is pretty much how I take my withdrawals, and if I feel the need for more cash for some reason, I'd sell off out of my inherited IRA and pull from there, since keeping this account lower or trying to make sure it depletes first is the end game as far as minimizing the taxable income and avoiding taxes in general. It's pretty big tho, and honestly I've been drawing out of it for over 5 years now and it's grown instead of shrunk despite taking even more than the minimums most years.
Because I have a sizeable amount of my portfolio in my own personal IRAs that will eventually require me to take distribution when I hit 70.5, the inherited IRA and the taxable are the ones I'm focusing on now for expenses, and my own IRAs are my "old lady" money.