We divide 686398 by 83
The aim is to understand the frequency of 83 in 686398.

Let's proceed to step 1:
The number 83 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 83

Moving on to step 2:
83 goes into 68 0 times with a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Bring next digit (6) of the dividend behind the 68 and repeat the process: 686 / 83

Let's proceed to step 3:
When dividing 686 by 83, we get 8 with a remainder of 22.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 22 after subtracting 664 from 686.
Fetch the next digit (3) from the dividend, attach it to 22 and continue: 223 / 83

Advancing to step 4:
83 can be fit into 223 2 times, resulting in a remainder of 57.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
If we take 166 away from 223, we end up with 57.
Include the next digit (9) from the dividend after 57, then repeat: 579 / 83

Going ahead to step 5:
The number 83 fits into 579 6 times, leaving a remainder of 81.
Write down 6 as next digit of the result. 
Result so far: 826.0
If we take 498 away from 579, we end up with 81.
Take the next digit (8) from the dividend and append it to 81, then repeat: 818 / 83

On to step 6:
83 can be fit into 818 9 times, resulting in a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 8269.0
Subtracting 747 from 818 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 7:
The number 83 fits into 710 8 times, leaving a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 8269.8
Subtract 664 from 710 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 8:
When dividing 460 by 83, we get 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 8269.85
Subtract 415 from 460 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 9:
83 can be fit into 450 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 8269.855
Subtracting 415 from 450 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 8269.855, with a leftover of 0.0035.