The phrase "quite easily" is correct and usable in written English. You can use it when you want to emphasize that something is easy. For example, "I finished the assignment quite easily.".
Quite easily.
He cries quite easily….
Quite easily, it seemed.
I'm quite easily led.
Sir Humphrey: Quite easily, actually.
Quite easily, it turned out.
And it was quite easily accessible.
When I feel like I can't trust my brain 100%, Ludwig really comes in handy. It makes me translate and proofread faster and my output more reliable.
Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu