@matigo I try to read for 20 minutes in the morning while having breakfast. Then I read in the evening if I happen to have time, and that can range from 5 minutes to an hour.
It also depends on the book how fast I can complete it. If it is ”easy to read” (that is, it is max 400 pages, in Finnish, and does not have a complex plot) it will be over in a week or so, if I can read it every morning and evening.