You may hear “fixed hour prayer” or “daily office” or “liturgy of the hours” or “morning prayer/evening prayer” but each speaks to having appointed times during the day and night to pray. It is a regular and consistent pattern of turning ones attention to God in prayer. If you will, it is a way of “interrupting” the course of the day to stop what you are “doing” and consciously, intentionally “be” before God in prayer.
Annie Dillard writes, “How we spend our days is, of course, how we spend our lives. What we do with this hour and that one is what we are doing. A schedule defends us from chaos and whim. It is a net for catching days. It is a scaffolding on which a worker can stand and labor with both hands at sections of time.” (from Spiritual Disciplines Handbook: Practices That Transform Us” by Adele Ahlberg Calhoun, p 225).