I had 2 female basenjis that had to be separated - ALWAYS.
One was easy, but in my mind I had to be fair and give each equal time not in the dog room (a sunroom on most house plans).
On nice days, the troublemaker could be left outside if we knew we'd be home in a few hours. In our case, the garage was not an option. it was dark, no windows in the area where we would have her, and it was just so not welcoming to any beast to be in. I would never put a toddler in there, so certainly not my basenji. She was meant to be with her people, or other dogs.
Our next idea was a pen we made in the dog room. It was 4' x 4', but before we left her in that, she showed us she could climb out of it! It was 4 ' high. So, we put a lid on it - 2 ex pens. The first night we let her scream. She went to each space on the side panels and bit them together - every one! Then, she did it so much, the next day I had to take her to the vet. She had worn down every tooth in her mouth, except 3, that he had to pull them out - all but 3! We couldn't leave her loose in the dog room because , unless she had access to her people, she was destructive.
To be honest, I can't remember exactly what we did. I think it was a bit more time with us than the other girl - who didn't seem to mind that much and was rather embarrassed for the breed because of the way the other acted.
The trouble maker was so much work, but I really cried when she was put down, at 17. I think she had a bit of OCD and other psychological problems - seriously, I do think that. I know no one would have given her the accommodating life we gave her.
lesson - be able to go to plan B, C, D ,E, because these beautiful creatures will test to see how creative you are!
I told people, when I placed a puppy with them, I don't place puppies with dumb people, you have to be able to admit that idea won't work, let's try plan B
(the trouble maker girl was crate trained until she was 2, and then NO WAY)
I wish you luck, and I suppose if it's only 2 times a week, it MIGHT be okay. You'll have to watch for any effect of not being able to see people at all for 8 hrs, will have.