591680 ÷ 83 
The aim is to understand the frequency of 83 in 591680.

Advancing to step 1:
When dividing 5 by 83, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 83

On to step 2:
The number 83 fits into 59 0 times, leaving a remainder of 59.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 59, we end up with 59.
Take the next digit (1) from the dividend and append it to 59, then repeat: 591 / 83

Advancing to step 3:
The number 83 fits into 591 7 times, leaving a remainder of 10.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 581 from 591 to get 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 83

On to step 4:
When dividing 106 by 83, we get 1 with a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 71.0
The remainder is 23 after subtracting 83 from 106.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 83

On to step 5:
The number 83 fits into 238 2 times, leaving a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 712.0
If we subtract 166 from 238, we get 72.
Bring next digit (0) of the dividend behind the 72 and repeat the process: 720 / 83

Moving on to step 6:
83 goes into 720 8 times with a remainder of 56.
The next digit of our result is 8. 
Result so far: 7128.0
The remainder is 56 after subtracting 664 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 7:
83 goes into 560 6 times with a remainder of 62.
The number 6 becomes the next digit in our result. 
Result so far: 7128.6
If we subtract 498 from 560, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 8:
83 can be fit into 620 7 times, resulting in a remainder of 39.
Write down 7 as next digit of the result. 
Result so far: 7128.67
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.

Moving on to step 9:
390 divided by 83 is 4 with a remainder of 58.
Put 4 as the next digit of the answer. 
Result so far: 7128.674
Subtracting 332 from 390 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 10:
83 goes into 580 6 times with a remainder of 82.
Record the quotient 6 as the next digit in the result. 
Result so far: 7128.6746
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.

Advancing to step 11:
83 can be fit into 820 9 times, resulting in a remainder of 73.
The number 9 becomes the next digit in our result. 
Result so far: 7128.67469
The remainder is 73 after subtracting 747 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 12:
When dividing 730 by 83, we get 8 with a remainder of 66.
Record the quotient 8 as the next digit in the result. 
Result so far: 7128.674698
The remainder is 66 after subtracting 664 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 13:
When dividing 660 by 83, we get 7 with a remainder of 79.
The next digit of our result is 7. 
Result so far: 7128.6746987
The remainder is 79 after subtracting 581 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 14:
83 can be fit into 790 9 times, resulting in a remainder of 43.
The number 9 becomes the next digit in our result. 
Result so far: 7128.67469879
The remainder is 43 after subtracting 747 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final outcome is 7128.67469879, with a leftover of 4.3e-08.