There is no single answer for this - there are far too many variables. And I can guarantee you are going to get just as many different answers.
The standard has always been 180 eggs per year as the rule of thumb. Remember there are seasonal breaks in laying, stress and other things that will slow or even stop any hen. You can get less, for sure.
In reality, the whole "egg a day" thing is unreachable over a sustained period. Every other day is typically best case over the long haul - and even that fades after about 18 months. In really good cases you will see 200/year but it isn't best to count on it out of the gate.
Should you choose to go by my figures, 180/52 = 3.46 eggs per week for any one hen, as an average. Call it four if you are inclined to be optimistic.
On a side note, Australorps are the only breed that has ever made the "egg a day" mark over an entire year. But, even that was a special hen, under a special breeding program. Her name was "Hen #21" and she was part of an international competition back in the early 20th Century, which the Aussies won. Such competitions were commonplace in those times, and the folks Down Under were so proud of their breed that they commisioned a postage stamp in it's honor!
Down to this day, Australorps are renowned as en egger breed. They are the ones I would go with, and I've had both 'Lorps and BO's.