A lot of music stations do bury such programming on weekend overnights, Sunday morning between 5 and 8 AM,or late Sunday evening after 10. The FCC doesn't care all that much when you deal with these issues as long as you can come up with program topics and guest lists that sound reasonable.
Of course, for news/talk stations this isn't an issue, because it's assumed that you're dealing with issues of public concern 24/7 unless you're running play-by-play. Such stations keep guest lists and topic lists for all their talk shows, as well as summarize major news stories they've been covering on an ongoing basis. Not hard, since a news/talk station is compiling those lists just in the course of preparing their daily promos and media releases.