We look at the division of 10572839 by 571 
The aim is to understand the frequency of 571 in 10572839.

Step 1:
The number 571 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 571

Step 2:
When dividing 10 by 571, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 10, we end up with 10.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 571

Advancing to step 3:
If we divide 105 by 571, we get 0 and a remainder of 105.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 105, we end up with 105.
Fetch the next digit (7) from the dividend, attach it to 105 and continue: 1057 / 571

Let's proceed to step 4:
The number 571 fits into 1057 1 times, leaving a remainder of 486.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 486 after subtracting 571 from 1057.
Fetch the next digit (2) from the dividend, attach it to 486 and continue: 4862 / 571

Step 5:
4862 divided by 571 is 8 with a remainder of 294.
Use 8 as the next digit of our solution. 
Result so far: 18.0
The remainder is 294 after subtracting 4568 from 4862.
Take the next digit (8) from the dividend and append it to 294, then repeat: 2948 / 571

Step 6:
The number 571 fits into 2948 5 times, leaving a remainder of 93.
Record the quotient 5 as the next digit in the result. 
Result so far: 185.0
Subtracting 2855 from 2948 leaves us with 93.
Grab the next digit (3) from the dividend, add it to 93, then carry on: 933 / 571

Let's proceed to step 7:
933 divided by 571 is 1 with a remainder of 362.
Use 1 as the next digit of our solution. 
Result so far: 1851.0
Deduct 571 from 933 and we're left with 362.
Take the next digit (9) from the dividend and append it to 362, then repeat: 3629 / 571

Going ahead to step 8:
571 can be fit into 3629 6 times, resulting in a remainder of 203.
Write down 6 as next digit of the result. 
Result so far: 18516.0
If we take 3426 away from 3629, we end up with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Step 9:
When dividing 2030 by 571, we get 3 with a remainder of 317.
Record the quotient 3 as the next digit in the result. 
Result so far: 18516.3
Deduct 1713 from 2030 and we're left with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Advancing to step 10:
When dividing 3170 by 571, we get 5 with a remainder of 315.
Put 5 as the next digit of the answer. 
Result so far: 18516.35
Subtracting 2855 from 3170 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Advancing to step 11:
If we divide 3150 by 571, we get 5 and a remainder of 295.
Write down 5 as next digit of the result. 
Result so far: 18516.355
If we take 2855 away from 3150, we end up with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

The final outcome is 18516.355, with a leftover of 0.0295.