Frequent Breastfeeding is taking a toll on my wife, how do I make it easier on her? Help!

Breastfeeding is never an easy path to take. As her husband, perhaps you could sit with her and talk to her while she breastfeeding/pumps. Get her a warm drink and some biscuits that she could have in case she gets hungry. After pumping session, offer to wash and sterilize her pumps so that she could take some time off to get some shut eye. You can tend to the baby if the baby isn't hungry so that she can rest for a little while. Every minute of rest counts, trust me.