We look at the division of 572490 by 83 
The aim is to understand the frequency of 83 in 572490.

On to step 1:
When dividing 5 by 83, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 83

Advancing to step 2:
83 goes into 57 0 times with a remainder of 57.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 57, we get 57.
Append the next digit (2) from the dividend to 57 and continue with: 572 / 83

Advancing to step 3:
When dividing 572 by 83, we get 6 with a remainder of 74.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 498 from 572 leaves us with 74.
Grab the next digit (4) from the dividend, add it to 74, then carry on: 744 / 83

Let's proceed to step 4:
744 divided by 83 is 8 with a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
If we subtract 664 from 744, we get 80.
Include the next digit (9) from the dividend after 80, then repeat: 809 / 83

Step 5:
83 goes into 809 9 times with a remainder of 62.
The number 9 becomes the next digit in our result. 
Result so far: 689.0
If we take 747 away from 809, we end up with 62.
Include the next digit (0) from the dividend after 62, then repeat: 620 / 83

Moving on to step 6:
83 can be fit into 620 7 times, resulting in a remainder of 39.
The number 7 becomes the next digit in our result. 
Result so far: 6897.0
The remainder is 39 after subtracting 581 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 7:
390 divided by 83 is 4 with a remainder of 58.
Record the quotient 4 as the next digit in the result. 
Result so far: 6897.4
If we subtract 332 from 390, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 8:
580 divided by 83 is 6 with a remainder of 82.
Put 6 as the next digit of the answer. 
Result so far: 6897.46
The remainder is 82 after subtracting 498 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 9:
If we divide 820 by 83, we get 9 and a remainder of 73.
Write down 9 as next digit of the result. 
Result so far: 6897.469
Subtract 747 from 820 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 10:
730 divided by 83 is 8 with a remainder of 66.
The number 8 becomes the next digit in our result. 
Result so far: 6897.4698
Subtracting 664 from 730 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 11:
If we divide 660 by 83, we get 7 and a remainder of 79.
Write down 7 as next digit of the result. 
Result so far: 6897.46987
Deduct 581 from 660 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 12:
83 goes into 790 9 times with a remainder of 43.
The next digit of our result is 9. 
Result so far: 6897.469879
If we take 747 away from 790, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 13:
The number 83 fits into 430 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 6897.4698795
Deduct 415 from 430 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 14:
83 goes into 150 1 times with a remainder of 67.
Record the quotient 1 as the next digit in the result. 
Result so far: 6897.46987951
Deduct 83 from 150 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

The final outcome is 6897.46987951, with a leftover of 6.7e-08.