The phrase "achieved largely" is correct and usable in written English.
It can be used to indicate that something was accomplished to a significant extent or degree.
Example: "The project's success was achieved largely through the team's dedication and hard work."
Alternatives: "accomplished mainly" or "attained primarily."
64 Target sample size was not achieved, largely because a large proportion of patients were transferred to another medical team following admission.
The main achievement of his first term, the clampdown on crime, was achieved largely by William Bratton, the then police commissioner, introducing private-sector management methods to the police force.
That was achieved largely through the 1997 acquisition of Boston Technology.
This 99% weight reduction has been achieved largely through advances in battery technology.
These victories were achieved largely by the new cavalry force built up by Nicephorus Phocas.
These results – despite the supermarkets' endless price wars – are achieved largely by getting suppliers to reduce their prices.
The LNA said the operation had been planned for months and had been achieved largely without any bloodshed.
Its political rehabilitation has been both swift and serendipitous, achieved largely through the accidental alchemy of George Bush.
Freddie's journey from floor-sweeping assistant to circus owner, through roles as a trapeze artist and lion tamer, is achieved largely by being a thoroughly decent boy.
A year earlier, a loans-related Public Lending Right (payment for library borrowings) had been achieved, largely due to the inspirational campaigning of Brigid Brophy and Maureen Duffy.
But here, overwhelming volume and Mr. Romaneiro's resourcefulness were no match for the rude vitality Mr. Corigliano achieved largely by old-school means.
