quite a lot
fixed phr..fixed phr.. A large amount or a large number of something. You can use it to mean 'many' or 'much'.
fixed phr.. A fixed quantifier phrase indicating a large but indefinite quantity or number. It is common in both spoken and written English.
She travels quite a lot for her job.
We spent quite a lot of money on our holiday last year.
The research revealed quite a lot of variation among the samples, which complicated the initial hypothesis.
Use it as a pronoun ('He knows quite a lot') or with 'of' before a noun ('quite a lot of people').
Point out that 'quite a lot (of)' works for both countable and uncountable nouns, whereas 'quite a few' is used only for countable nouns.
I have quite lot of work to do.I have quite a lot of work to do.The indefinite article 'a' is a required part of this fixed phrase.