Of course it depends on the individual person, but you can pump about every 3-4 hours (Or 2-3 times for 15 or so minutes while at work).
Most states have a law in place that your employer should provide you with the time, and a place that is sanitary for you to pump (NOT a bathroom). For more information on that, check out this journal. http://www.cafemom.com/journals/read/781130/Breastfeeding_and_the_LAW
Be sure to get a good quality pump (Medela Pump-In-Style or Ameda Purely Yours).
at 12:12 AM on Jun. 23, 2008