The phrase "a hefty increase of" is correct and usable in written English.
It can be used when discussing a significant rise in quantity, amount, or value, often in financial or statistical contexts.
Example: "The company reported a hefty increase of 20% in sales compared to last year."
Alternatives: "a substantial rise in" or "a significant boost of".
It was just last Saturday that Mayor Anthony M. Masiello inspected Buffalo's 16 new snowplows, boasted of a hefty increase in the number of workers trained to clear winter streets, and declared the city armed with "the will to win against winter".
Sky will pay an average of €876m per season for four years to retain its dominance of Bundesliga rights, a hefty increase from its current rate of €486m per season.
Estate agents claim prices in such choice locations are up by 80% in three years; and that in similar parts of Rio de Janeiro, boosted by the discovery of huge oil reserves off the coast and the prospect of hosting the Olympics in 2016, they have doubled.The property boom is being driven by a hefty increase in the number of potential buyers.
Police Step Up Patrols in Response to Higher Rates of Crime in L.B. Fueled by a hefty increase in burglaries, the number of reported crimes in the city rose 6% during the first half of 1985, police said this week.
On the factory floor, production is expanding, a point underscored by government data released Friday showing a hefty increase in March for orders of long-lasting manufactured items.
On May 22nd Morgan Stanley's board approved a hefty increase in the base pay of several senior executives, including its two co-presidents, whose salaries are rising from around $300,000 to $800,000 a year.
(One price of this absurd piece of political correctness is that very few of the figures in the Census add up).The black population saw a hefty increase in numbers, partly because of a campaign by minority groups to get more people to send back their census forms.
Sales for OSS Telecom Technology is forecasted to be moderate in year one and see a hefty increase again by the end of year three.
The review led to a hefty increase in pay, a symptom also of a generally lax approach to public finances.
