138021 ÷ 83 
The aim is to understand the frequency of 83 in 138021.

Going ahead to step 1:
83 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 83

Moving on to step 2:
83 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 83

On to step 3:
The number 83 fits into 138 1 times, leaving a remainder of 55.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 83 from 138 to get 55.
Fetch the next digit (0) from the dividend, attach it to 55 and continue: 550 / 83

Moving on to step 4:
When dividing 550 by 83, we get 6 with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 498 from 550 and we're left with 52.
Bring next digit (2) of the dividend behind the 52 and repeat the process: 522 / 83

Step 5:
83 goes into 522 6 times with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 166.0
The remainder is 24 after subtracting 498 from 522.
Bring next digit (1) of the dividend behind the 24 and repeat the process: 241 / 83

Moving on to step 6:
If we divide 241 by 83, we get 2 and a remainder of 75.
Write down 2 as next digit of the result. 
Result so far: 1662.0
The remainder is 75 after subtracting 166 from 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 7:
83 goes into 750 9 times with a remainder of 3.
The next digit of our result is 9. 
Result so far: 1662.9
The remainder is 3 after subtracting 747 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
30 divided by 83 is 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 1662.9
If we subtract 0 from 30, we 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.

Moving on to step 9:
300 divided by 83 is 3 with a remainder of 51.
The next digit of our result is 3. 
Result so far: 1662.903
The remainder is 51 after subtracting 249 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 10:
If we divide 510 by 83, we get 6 and a remainder of 12.
The next digit of our result is 6. 
Result so far: 1662.9036
Subtract 498 from 510 to 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.

Let's proceed to step 11:
If we divide 120 by 83, we get 1 and a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 1662.90361
If we take 83 away from 120, we end up 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.

Advancing to step 12:
83 can be fit into 370 4 times, resulting in a remainder of 38.
The next digit of our result is 4. 
Result so far: 1662.903614
Subtract 332 from 370 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 13:
When dividing 380 by 83, we get 4 with a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 1662.9036144
The remainder is 48 after subtracting 332 from 380.
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 1662.9036144, with a leftover of 4.8e-07.