We're dividing 721594 by 83 
The aim is to understand the frequency of 83 in 721594.

Let's proceed to step 1:
7 divided by 83 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 83

Let's proceed to step 2:
If we divide 72 by 83, we get 0 and a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Include the next digit (1) from the dividend after 72, then repeat: 721 / 83

Advancing to step 3:
83 can be fit into 721 8 times, resulting in a remainder of 57.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 664 from 721 and we're left with 57.
Bring next digit (5) of the dividend behind the 57 and repeat the process: 575 / 83

On to step 4:
83 can be fit into 575 6 times, resulting in a remainder of 77.
Write down 6 as next digit of the result. 
Result so far: 86.0
Deduct 498 from 575 and we're left with 77.
Include the next digit (9) from the dividend after 77, then repeat: 779 / 83

Advancing to step 5:
If we divide 779 by 83, we get 9 and a remainder of 32.
Record the quotient 9 as the next digit in the result. 
Result so far: 869.0
Subtract 747 from 779 to get 32.
Take the next digit (4) from the dividend and append it to 32, then repeat: 324 / 83

On to step 6:
324 divided by 83 is 3 with a remainder of 75.
The number 3 becomes the next digit in our result. 
Result so far: 8693.0
Deduct 249 from 324 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 7:
750 divided by 83 is 9 with a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 8693.9
Deduct 747 from 750 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
The number 83 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 8693.9
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
83 can be fit into 300 3 times, resulting in a remainder of 51.
Write down 3 as next digit of the result. 
Result so far: 8693.903
If we take 249 away from 300, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 10:
83 goes into 510 6 times with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 8693.9036
If we subtract 498 from 510, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 11:
83 goes into 120 1 times with a remainder of 37.
Put 1 as the next digit of the answer. 
Result so far: 8693.90361
Deduct 83 from 120 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 12:
83 goes into 370 4 times with a remainder of 38.
Record the quotient 4 as the next digit in the result. 
Result so far: 8693.903614
Subtracting 332 from 370 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 13:
When dividing 380 by 83, we get 4 with a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 8693.9036144
If we take 332 away from 380, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 8693.9036144, with a leftover of 4.8e-07.