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]
(..) - Thanks for the support, guys. - Oh, the support has just begun. What do you want me to bring to Papa Winger's house? Vegan pumpkin pie? Britta, you're not coming. Fine, regular pumpkin pie. You're gonna need me when things get messy and emotional. The thing that will get emotional is Troy... (..)2013 TvShow: Community Title: Cooperative Escapism in Familial Relations Season: 4 Episode 5