Salaams,
Can we see a plot which shows mistakes per page. Currently it only shows per session, hence we can only compare if each session is the same ie reading pages 712-718 in different sessions, the plot will show the trend of mistakes - but if in the next session, I read pages 714-720, I won’t be able to see the mistakes for the overlap pages within the history (ie pages 714,715,716,718).
Hence, denominate the mistakes per page (instead of per session).
JazakhaAllah