Standard Vist VISA for my mother from Paksitan

[JustGotHSMP]

I am extremely thankful to this wonderful forum and its members for their invaluable help and suggestions in amd making it possible to invite my mother to the UK.

Her recent visit, aligned with the dates specified in her visa application, allowed her to spend 20 delightful days with us, creating cherished memories together.

I do have a few queries and would greatly appreciate any assistance:

--My mother's current visa is valid until end of May 2024. I seek clarification on whether she can visit again for 2-3 weeks before her visa expiry.
--Alternatively, if the above isn't feasible, what is the earliest I can reapply for her visa?
--In considering the duration of the visa, should I opt for 6 months, 2 years, or 5 years in the next application?
--Are there additional documents required for applications for the 2-year or 5-year visas? What specifics should I include in the covering letter?
--I am concerned whether the Entry Clearance Officer (ECO) might raise objections to her visiting again within a relatively short timeframe. How can I address this potential concern?

Thanks once again.

[JustGotHSMP]

Sorry for bumping,

Please can any one can reply to the above queries.
Thanks in advance.

[JustGotHSMP]

@Frontier Mole
@Amazonian X
@Zimba
@Ticktack
@CR001
@secret.simon
@alterhase58

Sorry I have tagged so many., please can some one reply.

[Frontier Mole]

If the visa is multi entry then it would be ok to return on it. The visa will state multi entry if it is.