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.
See also: interval, regular
References in classic literature ?
The train, jerking at regular intervals at the junctions of the rails, rolled by the platform, past a stone wall, a signal-box, past other trains; the wheels, moving more smoothly and evenly, resounded with a slight clang on the rails.
They were surrounded by men, women, and children, who sang a kind of lugubrious psalm, interrupted at regular intervals by the tambourines and cymbals; while behind them was drawn a car with large wheels, the spokes of which represented serpents entwined with each other.
Many-hued decanters of liquor perched at regular intervals on the lower shelves.
at the end of George Street, where the cheap eating-houses (sixpence a meal) were kept by Chinamen (Sun-kum-on's was not bad), is heard at regular intervals.
At regular intervals down the long sides of the room, at right angles with the wall, were iron slabs, grooved like meat-dishes; and on each lay a body.
Twice, at regular intervals, he repeated the call, standing in attentive silence for several minutes after the echoes of the third call had died away.
It was mid-forenoon when the two at last entered one of the roads that cut through the cultivated districts at regular intervals, joining the arid wastes on either side with the great, white, central highway that follows through the centre from end to end of the far-reaching, threadlike farm lands.
When we approached these points a warrior would be sent far ahead with a powerful field glass, and if no great body of red Martian troops was in sight we would advance as close as possible without chance of being seen and then camp until dark, when we would slowly approach the cultivated tract, and, locating one of the numerous, broad highways which cross these areas at regular intervals, creep silently and stealthily across to the arid lands upon the other side.
In our diagram the line of succession is broken at regular intervals by small numbered letters marking the successive forms which have become sufficiently distinct to be recorded as varieties.
On the beach, at regular intervals, planks were placed as obstacles.
She sits in her room (in a side passage on the ground floor, with an arched window commanding a smooth quadrangle, adorned at regular intervals with smooth round trees and smooth round blocks of stone, as if the trees were going to play at bowls with the stones), and the whole house reposes on her mind.
When it returned she found herself in a large, circular chamber, the stone walls of which were pierced by windows at regular intervals about the entire circumference of the room.
Sometimes, when at leisure, he amused himself all day in the woods with a pocket pistol, firing salutes to himself at regular intervals as he walked.
He was a whiskey-guzzling Scotchman, and he downed his whiskey neat, beginning with his first tot punctually at six in the morning, and thereafter repeating it at regular intervals throughout the day till bedtime, which was usually midnight.
By degrees, a pulse or stress began to beat at regular intervals in his mind, heaping his thoughts into waves to which words fitted themselves, and without much consciousness of what he was doing, he began to write on a sheet of draft paper what had the appearance of a poem lacking several words in each line.