be as regular as clockwork

To happen at predictable intervals. My daughter starts crying every night at bedtime—it's as regular as clockwork.

if something is as regular as clockwork, it happens at exactly regular times Her letters arrived every week, regular as clockwork.

Name	Pronounced	Usage
Mehitabel	mi-HIT-ə-bel (English), mee-HIT-ə-bel (English)	Biblical
Lara (1)	LAHR-ə (English), LAH-rah (German, Italian, Spanish, Portuguese)	Russian, English, German, French, Italian, Spanish, Portuguese, Dutch, Hungarian, Slovene, Croatian
Fungai	-	Southern African, Shona
MyrgjÖL	-	Ancient Scandinavian
Reagan	RAY-gən	English, Irish
Adina (1)	-	Biblical, Biblical Latin, Biblical Greek, Hebrew