The rear wheels on my commuter bikes go through broken spoke phases, and I just went through one recently on my summer commuter bike. I can attribute that phase mostly due to the commute route that I was taking since I was riding off a tall curb in one spot, and I was riding with heavily loaded panniers.

Since my time is relatively cheap, spokes are inexpensive, and my commutes are not what I consider very long, I just replace them as needed.