The phrase "a large quantity of evidence" is correct and usable in written English.
You can use it when discussing the amount of evidence available to support a claim or argument in various contexts, such as academic writing or legal discussions.
Example: "The researcher presented a large quantity of evidence to support her hypothesis, making it difficult for the opposing side to refute her claims."
Alternatives: "a substantial amount of evidence" or "an extensive body of evidence."
The murder inquiry, named Operation Green, uncovered a large quantity of strong evidence incriminating Smith, but at first he denied responsibility.
A large quantity of previously unpublished documentary evidence is presented to show that the imagist experiments of Ezra Pound, Richard Aldington, Amy Lowell, and John Gould Fletcher were indebted to an engagement with Japanese visual culture that was far deeper than has ever previously been suggested.
Despite the large quantity of evidence suggesting the positive impact of immediate mother and neonate skin contact, it has not been adopted as a universal post-delivery care for healthy term children [ 16].
And just as lovers of John Le Carré thought they had heard enough, the death of Mr Litvinenko, a former KGB agent, escalated into a public health scare after police discovered that evidence of a large quantity of polonium 210, a rare radioactive substance which can only enter the body via ingestion or through an open wound, had been discovered in his urine.
In some peculiar galaxies that are strong emitters of radio waves, there is evidence that explosions have thrown a large quantity of gas hundreds of thousands of light-years into intergalactic space.
But, detailing the sealed grand-jury testimony, Judge Garaufis said the evidence showed that Mr. Dewgard had offered to sell a large quantity of cocaine to an informant and had also asked whether the informant had any guns for sale.
Freamon and Leander Sydnor gather enough evidence to arrest Stanfield and most of his top lieutenants, seizing a large quantity of drugs.
Selling a large quantity of diluted cocaine powder, or a small quantity of pure cocaine?
He also provides a large quantity of fascinating background information.
He had come to buy a large quantity of gold for a bargain price of $2m£1.2m2m).
