One term is a semester, which is ~ 4months. Most classes meet about 4 hours a week, so ~60 hours of class time per term. Profs always say you should spend 2 hours studying out of class for every hour in class, but very few people do that - I probably average about 1 hour out of class per 3 hours in class (but some classes take far more time).
So, figure a bare minimum of 60 hours, an average of about 80 hours, and an upper bound of about 200 hours (very rare, but there are a few classes that have problem sets from hell).
For example you may see in the teachers guide of a textbook: This can be covered in a one-term course.
How much 'study volume' i.e. study hours total does such a one-term course comprise?