I am not sure where to post this and don't have permission to edit the tabs on the main page but I think the minor characters tab on the main page should be updated to include Mr. Frond, Tammy and other "regular" minor characters. Alternatively, the minor characters tab could be removed. But as is, the tab of minor characters seems to only include very random minor characters.
The best way to do it would be to tally the "top" minor characters - minor characters who appear in the most episodes. I think Mr. Frond, Mr. Ambrose, Mort, Jimmy Pesto, Jimmy Junior, Zeke would all probably on top of the list.