Wiktionary
adv. (context idiomatic English) considerably
Usage examples of "quite a bit".
There was quite a bit on Lord Beniker, rather little about Durslan, and in both cases nothing that seemed significant.
She's done quite a bit of Shakespeare, among many other fine shows (I won't mention Charlie Brown).
In the week since they watched the murder of the old man, they had done quite a bit of scouting.
Then I realized there was quite a bit more to her than just a hot little skin-popper.
I found quite a bit of jewelry, which I ultimately put down a sewer, and I found several hundred dollars in cash, which I did not.
Vandene and her sister had talked quite a bit about runaways on the way to Ebou Dar.
It took quite a bit of traveling and even more smooth talk and persuasion before I managed to get four men to come: the three mentioned by Harman and one other, a Saul Simonoff.