How often should you cut Bermuda grass?

For the first 10 days to two weeks, until seed germinates, it should be kept damp. If it allowed to dry, then it can (and most likely will) kill the seed. Depending on year and location will depend on actual amount. Twice a day at a 1/4 to 1/2 inch of water per watering is a good place to start. You can gauge after that.