For E-verification of documents not much time is required. Although depending on the server strengths and other factors, you can keep in mind around 30 mins will be required for the document verification. For document verification in offline mode, the time take is dependent on the factors of crowd and also its a first come first serve kind of a thing. For offline verification take 1-2hrs in hand (if you have to go for offline verifications).

To know more about MHTCET counselling visit the link below:

https://engineering.careers360.com/articles/mht-cet-counselling

I hope this answer helps. All the very best for your future endeavors!