Holley, nanny share in Los angeles 90068

I have a great nanny and a 3 month old - I will be returning to work but really want to split the cost of childcare with another family. My work is flexible but does require concentration - so i do need a nanny but i could do one of two arrangements.
1. I could share our nanny in a 40 hr. work week to have full coverage and split cost. I am happy to host.
or
2. i could also probably get my work done (most weeks) if i had our nanny 3 days/week. If someone just needed 2 days a week, I could split the week as well.