It really, really depends on the field. Really.
Competitive English programs, for example, have ~5% acceptance rate. You aren't likely to bank on 2-3 schools -- the average (which always have their outliers, of course) number of applications tends to be nearer to 10 or 15.
I don't know what nursing programs tend to accumulate, but have you tried looking at the Career Center website? They tend to have pretty specific information about what Cal graduates do.