Agree with @Matth78 that using ‘last month’ is problematic due to differing frequencies.
I think we could say ‘latest episodes’ vs ‘all time’. ‘Latest’ then is 10 episodes, under the hood. We’d only show ‘latest’ in the podcast info screen, and display both in the stats detail view. Would that work?
I see your point. In the context of a bottom navigation, it might make sense actually to put ‘Podcasts’ and ‘Stats’ together. In a way, both screens provide the same list (podcasts), only with different information, in a different layout. So I would support your proposal to add a menu entry between ‘Sort’ and ‘Number of columns’.
In any case Stats are not settings, so I feel the screen should be moved either way, to wherever.