'once every second' is a correct and usable phrase in written English.
It is used to describe something that happens in regular, repeating intervals, such as every second, every minute or every hour. For example: The mechanism of the clock is ticking away, once every second.
It hop-hop-hopped at least once every second from perch to perch on a jerky, unpredictable path, sometimes in the undergrowth, sometimes boldly in the open.
Since we blink on average once every second, it follows that we can't see anything for 5% of the time we spend in a waking state.
The energy yield can far exceed the energy required to attain plasma ignition conditions, but this energy is released in a burst, and the process has to be repeated roughly once every second for practical power to be produced.
A prototype shown off by the company uses an embedded miniaturised glucose sensor and wireless chip in a contact lens to measure glucose in tears as often as once every second.
A living body is inherently electrical: once every second or so, a dime-size bundle of cells in the upper chamber of the human heart produces an electrical pulse that keeps the organ beating, until the pulse ceases and we die.
This demo application is sending a packet once every second.
In fact, Dickey's quest to win 20, and the Cy Young, has allowed the Mets a once-every-fifth-day escape from the dreary spell they often seem to be under.
Although ozone monitors operate on a daily basis during the summer months, PM monitors typically operate on a once-every-third-day schedule [ 31].
Maybe once every third circle, we glimpse one wolf as it passes from one cedar to the next.
A Hello packet is broadcasted once every seconds of silence.
Or maybe once every tenth or twentieth shit.
