How much time is required for putting on 10 kg?

I was 39 kg in 2021, I started gym, no sups
Regular meals, with a proper diet.
In 1 month I gain 5kg , at 44kgs
I shad to stop my gym and diet because I had to come to another city due to my admission, so I moved.
It took me one year to gain that 6 kg to make my weight to 50kgs.
I need to gain more 10 kg as my BMI is still very low.
I wanna gain faster, but with natural means, my college is ending and my job is going to start within a month of it. In that month I wanna gain as much as much possible.
How much time is required for putting on 10 kg?
Post Opinion