I'm assuming you are looking for a small BWV contract. If that is the case, here is the breakout of the percentage of points by UY for BWV:
- Feb 12.92%
- Mar 9.36%
- Apr 11.86%
- Jun 13.41%
- Aug 13.77%
- Sep 7.83%
- Oct 11.38%
- Dec 19.46%
The February UY actually has slightly more than the 12.5% you would expect if points were equally distributed among the eight UYs. Your odds would be worse if you wanted a September UY, and better if you wanted a December UY. Good luck in finding an attractive contract!!
Edited to add: If you are trying to find a February UY contract for BLT, then your chances would be great. The distribution of BLT is heavily skewed toward that UY. To date, over 47% of all points sold are in the February UY. Even if Disney didn't assign another Unit to the February UY, BLT will have 36.47% of all of its points in the February UY once the resort is sold out.