A book left face-down on the passenger seat gets read at traffic lights and in the ten minutes before an appointment. That's how most people actually finish books.
Daily intake matters less for the information than for the aim. All day you're pulled by whatever is loudest. Twenty pages in the morning is a small correction to the pull.
Choose slowly, though. Three books that change how you think beat forty that agree with you, and rereading counts as reading. The second pass is usually where the argument actually reaches you.