The phrase "attrition of which" is correct and usable in written English.
It can be used when referring to a specific type of attrition in a context where the subject has already been mentioned.
Example: "The team faced significant attrition of which the management was unaware until it was too late."
Alternatives: "loss of which" or "diminution of which".
SOEP includes reasons of panel attrition, one of which is Moved Abroad.
As with all longitudinal studies, there was differential attrition, details of which are available (Sweeting et al., 2001).
This is a war of attrition for which he has stockpiled inexhaustible reserves of cliché, which have also been distributed for use by footsoldiers on the Tory benches.
At the same time, Mohammed's statement seemed to back the government's position that Abu Ghaith was a key player in al-Qaida, saying fighting one of the world's superpowers meant "we would have to resort to a long war of attrition to which the military and media alike contribute".
By the time the Luftwaffe High Command (OKL) had begun organising an air defence to combat the United States Army Air Forces' (USAAF) strategic bombing campaign, they were already engaged in a war of attrition for which they were not prepared.
"Reduced to silence" is a humane but terrible description of man's fate in the camps; it is inevitable, final, an attrition of spirit of which the beatings and the humiliations are just the foretaste, and which can only be atoned for, all round, by the opposite to silence.
In fact, the Singapore Grand Prix on Sunday not only had more wild events, but even more tight racing, resulting in frequent changes of position in a race of attrition in which 14 of the 20 cars finished.
"We are in the midst of a war of attrition, which I am afraid will play into the hands of Islamic State".
It was a deadly war of attrition in which millions of soldiers on both sides slogged through the mud of no man's land to meet their deaths in withering blasts of machine-gun fire and artillery.
This requires first and foremost admitting to the failure of the costly policies of attrition, which have a moral, humanitarian, as well as material toll.
