We're dividing 215618 by 83 
The aim is to understand the frequency of 83 in 215618.

Going ahead to step 1:
When dividing 2 by 83, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 83

On to step 2:
When dividing 21 by 83, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 83

Let's proceed to step 3:
215 divided by 83 is 2 with a remainder of 49.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 49 after subtracting 166 from 215.
Include the next digit (6) from the dividend after 49, then repeat: 496 / 83

Advancing to step 4:
83 goes into 496 5 times with a remainder of 81.
The next digit of our result is 5. 
Result so far: 25.0
Subtract 415 from 496 to get 81.
Include the next digit (1) from the dividend after 81, then repeat: 811 / 83

Going ahead to step 5:
When dividing 811 by 83, we get 9 with a remainder of 64.
Use 9 as the next digit of our solution. 
Result so far: 259.0
Subtracting 747 from 811 leaves us with 64.
Include the next digit (8) from the dividend after 64, then repeat: 648 / 83

Advancing to step 6:
648 divided by 83 is 7 with a remainder of 67.
The next digit of our result is 7. 
Result so far: 2597.0
Subtract 581 from 648 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 7:
83 can be fit into 670 8 times, resulting in a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 2597.8
If we subtract 664 from 670, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
83 goes into 60 0 times with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 2597.8
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
The number 83 fits into 600 7 times, leaving a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 2597.807
Subtract 581 from 600 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
190 divided by 83 is 2 with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 2597.8072
If we subtract 166 from 190, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
240 divided by 83 is 2 with a remainder of 74.
The next digit of our result is 2. 
Result so far: 2597.80722
The remainder is 74 after subtracting 166 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Our division results in 2597.80722 with a remaining 7.4e-05.