The phrase "a readout of how" is correct and usable in written English.
It can be used when referring to a summary or report that explains the manner or method of something.
Example: "The report provided a readout of how the experiment was conducted and the results obtained."
Alternatives: "a summary of how" or "an overview of how".
The app gives me a readout of how many times I woke up, or didn't, throughout the night.
"You can put any text through affect-analysis programs and they will give you a readout of how many happy words are in there.
You'd simply scan an item and get a readout of how many calories, fat, and whatnot it contains.
The ratio of absorbance by the media of 570 nm light to absorbance of 600 nm light then serves as a readout of how much resazurin has been converted; metabolically active cells show an increase in absorbance of 570 nm light relative to absorbance of 600 nm light over time.
The disk is turned by the electricity passing through the meter, giving a readout of how much electricity you are using.
It was a real-time readout of how Social Security would protect workers and their families in the event of retirement, disability or untimely death.
The promise of meta-omics is that we will be able to reach these sites and gain a more comprehensive readout of how the disappearing microbiome and the emerging pathobiome affect the inflammatory response and the ultimate outcome of the patient.
This tactic provided a readout for how home energy use has evolved since the early 1990s.
Therefore, the control signal can be used as a readout of network excitability, analogous to how injected current from a voltage clamp amplifier can be used to asses cellular excitability.
Introduction of luciferase reporters into microbes provides an additional layer of information that is a readout of the association between organisms and how this might be affected by environmental conditions.
Last month a network news show told how 23andMe was able to, with a single test, "give you a readout of your risk for heart attacks, ms, lung cancer and 90 other conditions".
