The phrase "assists greatly" is correct and usable in written English.
It can be used to describe how something significantly helps or supports another thing or person.
Example: "The new software update assists greatly in improving the overall performance of the system."
Alternatives: "provides significant assistance" or "greatly aids."
A major campaign to control noxious emissions was launched, assisted greatly by a changeover from coal to natural gas as the principal fuel.
And his numerous letters to the leading men of the country assisted greatly to form a sentiment favourable to a more perfect union.
High-fibre foods have a beneficial role in appetite control, and hence eating a high-fibre diet can assist greatly in weight control and weight-loss, but only with self-monitoring and a bathroom scale.
He said the power will "assist greatly" the rebalancing of the Northern Ireland economy.
Theoretical models, especially computer-based theoretical models, have a potential to assist greatly in fire safety decision-making.
This will assist greatly in predicting risk for other critical injuries related to vital neighbouring structures such as vasculature, brain stem, cranial nerves and spinal cord.
In particular, highly permeable layers at the completion or in between the completion and the oil water interface assist greatly in reducing coning.
Molecular assays also can be used to subtype influenza isolates, and sequence analysis of hemagglutinin may assist greatly in surveillance studies and vaccine strain selection.
The optimal parameters and the automatic pumping scheme developed from this study will assist greatly in future industrial scale application of producing microbial oils from crude glycerol.
In case of a problem, there was an excellent liaison officer who could assist greatly by communicating with the overwinterer and their family, in the event of stress, illness or bereavement.
