What story structure(s) are used in the Quran?

I was wondering based on analysis of the Quran, what story structure is used in it when telling a story, recounting an event or in general? I've heard in passing that the Quran uses a ring structure, but as stated, only in passing.

I would be grateful if anyone can direct me to research or material on this topic.

I’m working on a story where a character joins an insurance company, and I want the day-to-day work and internal structure to feel believable.

I’m looking for more like how things actually work in practice.

A few things I’m trying to understand:

What do different roles actually do day-to-day? (underwriters, claims adjusters, agents, etc.)

#How does the hierarchy usually look inside a company?

#What does a typical workflow look like from selling a policy to handling a claim?

#What are some common tactics companies use to avoid payouts or protect profits? (if any)

#Any small details that most people wouldn’t know but is common knowledge among company.

Tactics and ways they use to reject the claims in order to save for themselves

If you’ve worked in insurance ,or had any kind of experience dealing with them please share for my guidance.

Thanks in advance!

So I'm writing a story where I need a specific character to acquire a specific poison. This specific poison have to be a slow acting one, one that starts acting after 48-50 hours. Is there any like that?