If your younger daughter has schools on her list that meet full financial need, you can call the schools and ask if they count grad school as 2 in school. Like I said… some do, but most don’t.
Schools that do count grad schools as 2 in college …still have some FAFSA rules in place. For example… the parents need to be providing some level - percentage- of financial support ( clothing, haircuts, spending money, food, transportation costs etc …all count).