regular
reg-u-lar
adjective
Happening or done at fixed, consistent times or in a usual way.
"She has regular meetings every Monday."
noun
A person who frequently visits a place or uses a service.
"He's a regular at the local café."
Thesaurus
Synonyms: usual, full-time, frequent, steady, even, fixture, habitue, symmetrical, symmetric, unconstipated, diarrheal, lax
Antonyms: constipated, irregular