Let's divide 50571 by 90
The aim is to understand the frequency of 90 in 50571.

Let's proceed to step 1:
90 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 90

Let's proceed to step 2:
If we divide 50 by 90, we get 0 and a remainder of 50.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 50, we end up with 50.
Append the next digit (5) from the dividend to 50 and continue with: 505 / 90

Step 3:
If we divide 505 by 90, we get 5 and a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 450 from 505 leaves us with 55.
Fetch the next digit (7) from the dividend, attach it to 55 and continue: 557 / 90

Let's proceed to step 4:
90 goes into 557 6 times with a remainder of 17.
The next digit of our result is 6. 
Result so far: 56.0
If we subtract 540 from 557, we get 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 90

Moving on to step 5:
When dividing 171 by 90, we get 1 with a remainder of 81.
Put 1 as the next digit of the answer. 
Result so far: 561.0
The remainder is 81 after subtracting 90 from 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 6:
90 can be fit into 810 9 times, resulting in a remainder of 0.
The next digit of our result is 9. 
Result so far: 561.9
Subtracting 810 from 810 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
The number 90 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 561.9
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 561.9
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 561.9, with a leftover of 0.0.