I just googled it, and I’m not sure about it

human concentration rate is from 10–20 mins

Let’s say it’s 25 minutes

That reminds me of “Pomodoro Technique“

Which is one of the famous techniques to study

I don’t fully believe in those cuz everyone has his own way, but it can be so useful to people who don’t know how to start or manage time

Pomodoro Technique
is a time management method based on 25-minute stretches of focused work broken by five-minute breaks. Longer breaks, typically 15 to 30 minutes, are taken after four consecutive work intervals.
- it is highly effective as it helps you effectively manage your time
- Its creator, Francesco Cirillo, was using a timer in the shape of a tomato when he was a student at the university, to develop his idea after that in the late eighties, and it became one of the most popular organizing techniques.

This is actually as a start, If you find it kinda short time like me, Use the same technique with your time for e.g 50/10
50 minutes work and 10 for the break.

"On a field, sable, the letter A. Gules"

Please don't listen to it during Ramadan

I know not Lethe nor Nepenthe

I'll explain this one day

"I have thought of death" she said,--"have wished for it,-- would even have prayed for it, were it fit that such as I should pray for any thing."

I,--a man of thought, the book worm of great libraries,__a man already in decay, having given my best years to feed the hungry dream of knowledge.

But, up to that epoch of my life, I had lived in vain. The world had been so cheerless! My heart was a habitation large enough for many guests, but lonely and chill, and without a household fire. I longed to kindle one! It seemed not so wild a dream,-old as I was, and sombre as I was, and misshapen as I was, that the simple bliss, which is scattered far and wide, for all mankind to gather up, might yet be mine.

It is my purpose to live and die unknown.