Take a single sheet of paper, and divide it into two equal columns. At the top of the page, label one column "Mom" and the other "Dad". Then, on the left hand side of the paper, divide the two columns into 7 separate rows, and label them for each day of the week, Monday - Sunday. You have just created a spreadsheet that should have two columns and 7 rows - in other words, 2 x 7 = 14 individual boxes.
For each day of the week, further subdivide the page into 24 more rows (within each day), representing each hour of the day, and label them so 1 a.m., 2 a.m., etc. Your spreadsheet now has 168 rows, but still only two columns.
Hand this paper to your X, and ask her to fill it out completely, so that each shaded box represents the time your kid will spend with one of the parents. There should be 168 shaded boxes, one in each row, which means every hour of the kid's life is accounted for. However, each column should also have some shaded boxes, which means the kid spends time with each parent. Make sure there is no overlap - the kid is either with mom, or with dad, but never both at the same time. Make sure there are no gaps - the kid is always with one parent or the other at any given time.
Now, there are an a very high number of ways to shade the boxes, too many to count, but that's not important. Let your X shade the boxes any way she desires, but ask her to focus on absolutely the best schedule for your kid from her perspective. Tell her that this represents the child's best interests, and she should be prepared to submit her request to the judge. She has to be sure that this is the best possible schedule for your kid.
When she is done, ask her to sign and date it, not because you are agreeing to it, but because she is proposing it for your final review. Then, in the privacy of your home, take a good look at it.
If you agree with your X, then sign it, and the judge will likely put the court stamp on it, and you are now the proud owner of a custody order for physical custody. If you substantially agree with your X, except for minor revisions, then put your proposed revisions in writing, and submit to her for her approval and/or further negotiation. Lastly but most importantly, if you completely disagree with your X's timeshare proposal (and from what you have mentioned so far, I am willing to bet your X is going to have the kid staying with her most of the time), then your revision is quite simple.
If your X is attempting to hoard all the kid's time for herself, then at the top of the page, simply cross out "Mom" and write "Dad" and vice versa. Tell her you agree with the revised schedule (which gives you the lion's share of the kid's time). Of course, your X will now howl about how unfair it is. Then, you will remind her that she assured you that her initial proposal was the best possible thing for your kid, and after you have merely flipped the coin, she now says it is unfair.
You have now exposed her as a hypocrite, among other things. And if this is the case, you should prepare for a long court battle.
JMHO. Good Luck.