The buses run from 4 a.m. to midnight 'at regular intervals'. [=there is the same amount of time between buses]
It's nothing special, just a 'regular' [='basic'] stereo. = It's just a 'regular old' stereo.
He is one of the store's 'regular customers'. [=customers who shop at the store frequently]
(..) Yeah. Right. Right. To be continued. Okay. Good morning. Welcome to A-. Just the regular, please. Well, we're having a special on hand wax-- .-- if you're interested in getting rid of those water spots. Just the regular is fine. (..)2013 TvShow: Breaking Bad Title: Blood Money Season: 5 Episode 9