The phrase "a level of which" is not standard in written English and may sound awkward or incorrect.
It can be used when referring to a specific level in a context where the antecedent is clear, but it is better to rephrase for clarity.
Example: "The project requires a level of which we have not yet achieved."
Alternatives: "a level that" or "a level to which".
The third method, which is by far the most popular, and which has brought mirthful pleasure to millions on an annual basis, is to sing in Eurovision English: an exquisite tongue, spoken nowhere else, which raises the poetry of heartfelt but absolute nonsense to a level of which Lewis Carroll could only have dreamed.
Anthony Lane, in his 2010 review of the Eurovision Song Contest, "Only Mr. God Knows Why,"cited "Eurovision English" as one of its chief pleasures: it's "an exquisite tongue, spoken nowhere else, which raises the poetry of heartfelt but absolute nonsense to a level of which Lewis Carroll could only have dreamed".
By The New Yorker June 21, 2010 This week in the magazine, Anthony Lane writes about the Eurovision Song Contest, an annual World Cup of campy pop music where the lyrics are often written in what Lane calls "Eurovision English": an exquisite tongue, spoken nowhere else, which raises the poetry of heartfelt but absolute nonsense to a level of which Lewis Carroll could only have dreamed.
The newly-released figures have a level of detail which reveals for the first time exactly which salmon farms shot seals to protect their stock.
"There's a level of voyeurism which has to do with basic sex and sex appeal which makes these women ripe for more press coverage".
He achieved a level of fame which was extraordinary.
Watson clearly has a level of ability which, when he hones it properly, sets him apart.
"At the moment I have a level of recognition which is pleasant.
a level of education which corresponds to completed university studies (Master's or equivalent).
He also has a level of talent which should ensure a regular position within the world's top five.
The result is a level of rents which taxes the expenditures of families" for "relatively small dwellings".
