Hello aspirant,
I am here for helping you...
I am providing you a link below I hope this link will help you at some extent..
https://www.jmi.ac.in/polytechnic/courses-name/Diploma_Engineering_Regular_CivilComputerElectricalElectronicsMechanical-498/1
I want to clarify you that if you are talking about timing of your course so it will it will be notified you officially if you have taken admission...
and it's not easy to predict what is actual time and  it changes as per the condition...
I hope it will be beneficial for you...
For more queries you can upvote my answer and can ask in the comment section below...
Best of luck....