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]
(..) to straten you out. In some parts of this world, such as where dirty immigrants like yourself come from, it is often that human flesh is eaten regular as other food is so scarce and people would starve without it. Of course it is usuly children what is eaten (..)2018 TvShow: The Alienist Title: These Bloody Thoughts Season: 1 Episode 4