Can you please change Olivander's to work with just the last name, as several other work with only one name this should be not be an exception. Also Aragog, while I do agree talks in the film is not on your source's list of screen time.
How do you evaluate character screen time for characters using polyjuice potion? Do you count it as the character seen on screen or the actual character who drank the potion?
BTW, the source link has changed. It can now be found on: https://www.imdb.com/list/ls027460372/