Does this wiki has a list showing how many episodes each character appears in? (something like this). Thanks 00:11, July 23, 2016 (UTC)

For starring cast members, there is this page. If you're talking about other characters not in the starring cast, I don't think there's a page for multiple seasons, but you can enter the individual season cast pages and see the recurring cast section. (1,2,3,4,5,6)
Also, on each character page, there's a section for the character's appearances.