"chance phenomenon" is a correct and usable phrase in written English.
You can use it to refer to events happening by chance, which are difficult to predict or control. For example: "The scientist noticed a chance phenomenon that seemed to be occurring due to a previously unknown natural law."
Was this really a chance phenomenon?
The committee of experts brought together by the Government to advise them on BSE and CJD said they were now looking at something greater than a chance phenomenon.
Thus, the recent emphasis on the speech of minority groups, such as the Black English of American cities, is not a chance phenomenon.
It's not a chance phenomenon - he does it again and again, always with the same results.
This definition does not carry any judgement as to whether the cluster may or may not be a chance phenomenon.
In assessing the precise role of Opc/α-actinin pairing in meningococcal pathogenesis, the possibility that this interaction may be a chance phenomenon has also to be considered.
The development and retention of misconceptions of situations of chance may be due to an inherent tendency for individuals to interpret chance phenomena in terms of cause and effect or as self-correcting (Tversky and Kahneman 1982, Wolpert 2007).
We do not suspect the randomization procedure to have been inadequate and therefore can assume these observed imbalances to have been chance phenomena.
I don't know the current science on this, but as a chance natural phenomenon it did seem awfully selective in its choice of shots and narrative-friendly cropping of pictures.
These play a crucial role in "moral luck", the phenomenon of chance outcomes influencing moral judgments1, 19,20,21,22.
There's a good chance the weather phenomenon El Niño will appear in the next six months, weather forecasters say, but farmers don't need an official decree from meteorologists – they can just look out the window.
