For as hard as separation can be, it does give you both two things -- time without each other and chunks of time totally alone. Especially for the new "spare" time alone, use every bit you can to work on yourself. Regardless of what happens with your marriage, you'll need this. However, it can also be the thing that ends up saving your marriage.
My WS and I were separated for over a year starting at about 4 months post Dday. What she did with that time was absolutely instrumental in making R possible. She read. She reflected. She went to IC 2X a week. She added a faith-based IC 1X a week. In other words, she had the self-motivation to figure out why she had cheated, what character gap existed within and what she needed to do to be a healthier person. She changed. It wasn't all at once -- it was slowly, bit-by-bit, but as I evaluated things every few months it was apparent and I decided to give her and us more time.
If I asked him right now, R or D, he would say D.
That can change over time, so don't be too alarmed.
Immediately after Dday, my W and I went to a counselor who suggested IC for both of us and that we wait for 1 year before making any major decisions. I agreed and was hopeful that we might be able to work things through. By 4 months post Dday, I was solidly in the D camp. By 6 months, I saw some of the first signs of progress in my W, but I still was solidly D. At 1 year out, I was still leaning towards D, but I had seen enough progress to decide to postpone making a decision to D for 3 months. So I would review every three months and look at the progress in my W and in our marriage. I think it was close to 2 years out before I was leaning towards R. Yes, it took me that long. But my W did everything she could to work on her own healing and to do whatever she could to show me that she supported me and loved me regardless of how things turned out.
There are no guarantees of what your BH will do, but you control what you will do. Go heal. Show your BH love and respect, even when that means giving him space and losing some time with your daughter. Be patient. Be kind. Find deep empathy for the pain that you caused for him. At the absolute minimum, you will come out a fuller, healthier person.
Do you have any tips to help our daughter through this?
landclark has some excellent advice.
What your daughter needs right now is to be loved and to know that it isn't her fault. She then needs models of what a relationship should look like -- that what happened was wrong, that it's not OK to just rugsweep what happened, that apologizing is important, that rebuilding trust takes time, that spouses work their issues out together even when it can be messy, etc.
Do you have any suggestions for us when we do meet up to discuss our work?
First, understand that he needs to go through a process that will take a very long time. The rule of thumb is 2-5 years. Google "Stages of Grief" for an overview and know that he likely is currently in the anger stage and will be battling that for months.
Second, when he has something to say, listen. Listen intently not only with your ears, but with your eyes and your heart. It could be that he doesn't have much to say for a while. Or he might just vent some of the anger he is dealing with. But whatever he expresses is an insight into where he is at and an opportunity for you to be empathetic towards him.
Finally, share your own journey as you discover brokenness, experience guilt/shame, identify the roots of what allowed you to choose an A and take responsibility for how you'll act going forward. Those insights could very well be the seeds of allowing your BH to decide to give more time and to begin trying to rebuild trust with you.