interval

at regular intervals

At an equal distance apart. Make sure to position those Christmas lights so that the flashing ones appear at regular intervals.

at regular intervals

[of things in a series] at points that are equally distant from each other. You will find service stations at regular intervals along the highway. There are street lights at regular intervals on the main street of town.

at intervals

In a series separated by space or time: trees planted at intervals; coughing at intervals.

Common Names:

Name	Pronounced	Usage
Mahmut	-	Turkish
Jabril	-	Arabic
Maurus	-	Late Roman
Gratia	-	German
Christoffel	kris-TAWF-fəl	Dutch (Archaic)
Hippocrates	-	Ancient Greek (Latinized)