The phrase "a hefty part" is correct and usable in written English.
It can be used to describe a significant or substantial portion of something, often in a context where size or importance is being emphasized.
Example: "A hefty part of the budget was allocated to marketing efforts this year."
Alternatives: "a significant portion" or "a large share".
In the BBC series, a hefty part of the flavour came from dredging up reminders of how chuffing grim 1970s Manchester was.
Moreover, many students who enter a degree program but do not complete it still end up heavily in debt — taking on a hefty part of the cost of higher education without getting its full benefits.
The Hamptons won't be paying it, but the Marlins and the Rockies will be paying a hefty part of Hampton's salary, making whatever the amount is the most cash ever included in a trade.
Talbot devotes a hefty part of his performance to a celebration of "the ninth art", rightly presenting the Bayeux tapestry as one of its early masterpieces, less convincingly arguing that Hogarth's Gin Lane is a comic without panel divisions.
So after my diagnosis, a period on sick leave and a very useful discussion with an advisor on the Equality and Human Rights Commission helpline, I decided to tell my managers and HR team about my MS. A hefty part of the "coming out" process, it was a great experience.
That's because a hefty part of those vehicle costs design, engineering, tooling, headquarters overhead are yen costs from the homeland.
A hefty percentage got lost.
The song cycle "Lament for the Death of a Bullfighter" (1998-2001) has a hefty piano part as well, and there were times when it grabbed the ear more fully than the vocal line.
Aviva slipped 1.3p to 382.7p after finally disposing of its unwanted US business at a hefty loss, as part of its strategic review following the ousting of chief executive Andrew Moss.
Preference share owners had been given the tradeable shares, which came with a hefty haircut, as part of a cash injection worth billions of euros into the bank that wreaked most damage on Spain's financial system after suffering huge losses on toxic loans to real estate developers.
Flossing a bright red blazer and a hefty afro, the part-Puerto Rican crooner looks like he time traveled to a vintage Euro discotheque.
