Wikipedia
Regulares
The Fuerzas Regulares Indígenas ("Indigenous Regular Forces"), known simply as the Regulares (Regulars), were the volunteer infantry and cavalry units of the Spanish Army recruited in Spanish Morocco. They consisted of Moroccans officered by Spaniards. These Moroccan troops played a significant role in the Spanish Civil War (1936–39).
Usage examples of "regulares".
Los hijos sólo se engendraban a intervalos regulares, aproximadamente cada tres siglos.
No tienen ritos regulares de adoración, ni templos, ni altares o sacerdotes.