The phrase "a vast group of" is correct and usable in written English.
It can be used to describe a large number of people or things that are categorized together.
Example: "The conference attracted a vast group of experts from various fields to discuss the latest advancements in technology."
Alternatives: "a large number of" or "a significant collection of".
I envisioned a vast group of people, men mostly, who pursued a particular kind of frictionless life.
For Nissim's army buddies, 8200 is Israeli hi-tech's old school tie, opening doors to a vast group of like-minded and similarly-trained entrepreneurs.
We have created the Debt Generation, a vast group of people in whom a mental switch was tripped while they were trying to get an education.
The nematodes, in particular, are a vast group of tiny worms that are both ubiquitous and virtually unacknowledged outside the laboratory.
Evidence accumulated since 1955 suggests that very low doses of background radiation probably account for 25percentt or more of a vast group of afflictions that occur because of an inherited predisposition.
You can already here a vast group of people shriek and shake their heads at his statement but the fact is that today social media is the way young artists to get themselves known.
Heterolobosea is a vast group consisting almost exclusively of unicellular amoebas or amoeboflagellates (Page and Blanton 1985; Harding et al. 2013).
Now in its sixth year, and such a huge international success, it would be forgivable if the entire London art scene just imploded into a vast group-hug of self-love.
If the federal government doesn't wake up to this fact and learn how to effectively communicate with this vast group of people, we're looking at a future of uninsured, impoverished Americans.
If you're silent, you'll be presumed to be part of the vast group of companies that are [part of the problem]." And silence does remain the rule – even though nothing in federal law expressly prohibits it.
Ms. Keshavarz said that she wanted to reach the vast group of exiles created by the Iranian revolution, and that even inside Iran, where the film will probably be banned, citizens are likely to see smuggled copies.
