The phrase "a good bit about" is correct and usable in written English.
It can be used to indicate a significant amount of information or detail regarding a particular topic.
Example: "In her presentation, she shared a good bit about the history of the company and its future plans."
Alternatives: "a fair amount regarding" or "a considerable amount about".
I'd been in Austin many years, and I knew a good bit about him".
It might tell us a good bit about the sincerity or cynicism of the administration.
Mr. Axinn, a lawyer who is registered as a Democrat, knows a good bit about the subject.
But anyone who can put together 30 acquisitions in the span of a few years, as he did while assembling the company that merged with and ultimately took control of Donnelley, knows a good bit about deal-making.
Cecil rented his farm in Bunyah from his father, John; the two had quarrelled a month before Les's birth, and Cecil was given little help thereafter: "My parents used to complain a good bit about poverty.
At 62 — although she says she prefers to give her age "in Celsius: 17" — Ms. McGovern is sharing both her career rise-and-fall-and-rise story and a good bit about her personal life in this almost-solo show, Two River Theater Company's latest main stage production.
It's best to write about something you have a good bit of knowledge about.
There has been a good bit of talk about the need for a national conversation about race.
The affluent have a good bit to worry about — higher taxes, new uncertainty in the stock market.
The New Yorker, February 20 , 1932P. 11 The Museum of Natural History is bothered a good bit by questions about Indians and requests for Indian names for things.
The film also offers a long, surreal sojourn in Morocco; a good bit of talk about Bill's possible homosexuality; and rampant insect imagery, the mildest of which are manual typewriters that turn into talking bugs.
