I returned to work when my LO was about 4 mos. He is in daycare 9 hrs/day, and usually my husband drops him off, while I pick him up.
I nurse around 6 or 7a depending on when he wakes before work, then again after I pick him up around 5:15p, depending on when his last daycare bottle was. I try to delay to just before his bedtime (around 7p) if possible.
While at work, I pump every 3 hrs: 10, 1, 4. And because I'm not currently making enough in that time to allow him to have 3 6-oz bottles while at daycare, I'm also fitting in another session a couple hours after he goes to bed and before I go to bed. I'm convinced they have him doing keg stands at daycare, as he goes through milk so quickly! He doesn't have a prob. when I'm just nursing him every 3 hrs on a weekend day. I also nurse for wake-ups overnight.
I really wish I could pump more per session, so I'm trying to drink enough water, drink Mother's Milk tea, trying Fenugreek (though have to be more diligent), etc.