The phrase "one single occasion" is correct and can be used in written English.
You can use it to refer to a single, specific event or occurrence. For example, "We were lucky enough to spend time together on one single occasion before the pandemic began."
An anonymous source close to the U.S. government investigation of the hacker told the Daily Beast that on one single occasion, Guccifer 2.0 failed to log into the usual VPN that disguised their traffic.
"So people are skeptical that on one single occasion, drugs actually went from the US into Mexico?" Payne asked, referencing Vasquez, Ruzzamenti, and Crawford's disbelief.
The proportion of frequent binge drinkers (as reported drinking of at least 5 glasses/cans of alcohol beverages on one single occasion three times and more in the past month) increased from 35.0percentt in 2004 to 45.5percentt in 2011 [ 15, 16].
Workers were classified as hypertensive during their routine annual mandatory health evaluations based on two blood pressure measures taken at one single occasion.
A third limitation is that our data were collected at one single occasion, so the seasonal variations were based on the recordings at the different attending dates.
In almost 40 years as an educator, I cannot think of one single occasion when someone has stopped me to recall fondly about an inspirational and influential piece of computer software.
The MSSS visited ten of these locations on a single occasion and three on more than one occasion.
Fever was defined as an oral temperature greater than 38.3°C on a single occasion or greater than 38.0°C for one hour or longer during the first 24 h after admission.
One limitation of our study is that OGTTs were performed on a single occasion during hospital admission.
In all, 7 patients were admitted on two separate occasions, whereas the remaining 57 were admitted on a single occasion.
"But on every single occasion, that offer has been ignored.
