Continual prayer – Perpetual prayer (Latin: laus perennis) is the Christian practice of continuous prayer carried out by a group.

What is interesting here is also protestants have a continual 24/7 prayers since the 18 century.

Present day
The International House of Prayer in Kansas City, MO, a 24-7 prayer house

The first known Protestant continuous prayer was the “Hourly Intercession” of the Moravian Brethren in Herrnhut, Saxony. Beginning in 1727, the prayer continued 24 hours a day every day uninterrupted for over 100 years. The Moravian Unity began this continuous prayer vigil anew in 1957 as part of their 500th anniversary observance.

Today, perpetual prayer is a common practice in many churches. Often the term 24-7 prayer is used to express that the prayer continues 24 hours 7 days a week. A notable example of current day perpetual prayer is the Jerusalem House of Prayer, International House of Prayer in Kansas City as well as other prayer houses such as the Justice House of Prayer that were inspired by this ministry. Many churches organize 24-7 prayer weeks that last for one or several weeks.

Also, many of the Cursillo, Walk to Emmaus and other similar Three Day and 4th Day Movements employ a similar laus perennis model during the actual retreats as 4th Day members who have already attended the events sign up for and maintain a continuous prayer clock throughout each retreat of each community with specific prayers for each new participant, or pilgrim.

Continual prayer – Wikipedia

https://en.wikipedia.org/wiki/Continual_prayer

Perpetual prayer (Latin: laus perennis) is the Christian practice of continuous prayer carried out by a group.