About how many pages of fiction novel reading do you think high school teachers should assign for homework per night?

My kids were really busy with jobs, college apps, their social lives and after school activities by High School. They would get assigned a book and a certain amount of time in which to finish it. It helped them learn to manage their time themselves. No one follows you around in college.

I'd like the teacher to assign the book and let the kids read at their own pace, like we do when we read for fun. No need to make them resent it.