We look at the division of 106515 by 28 
The aim is to understand the frequency of 28 in 106515.

Advancing to step 1:
1 divided by 28 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 28

Going ahead to step 2:
When dividing 10 by 28, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 10, we end up with 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 28

Going ahead to step 3:
The number 28 fits into 106 3 times, leaving a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 84 from 106 leaves us with 22.
Bring next digit (5) of the dividend behind the 22 and repeat the process: 225 / 28

Moving on to step 4:
225 divided by 28 is 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
The remainder is 1 after subtracting 224 from 225.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 28

Let's proceed to step 5:
28 can be fit into 11 0 times, resulting in a remainder of 11.
The next digit of our result is 0. 
Result so far: 380.0
The remainder is 11 after subtracting 0 from 11.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 28

Advancing to step 6:
When dividing 115 by 28, we get 4 with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 3804.0
If we subtract 112 from 115, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
28 goes into 30 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 3804.1
Deduct 28 from 30 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
28 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 3804.1
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
If we divide 200 by 28, we get 7 and a remainder of 4.
The next digit of our result is 7. 
Result so far: 3804.107
Deduct 196 from 200 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
28 goes into 40 1 times with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 3804.1071
Subtract 28 from 40 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.

Moving on to step 11:
The number 28 fits into 120 4 times, leaving a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 3804.10714
Deduct 112 from 120 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
28 goes into 80 2 times with a remainder of 24.
The next digit of our result is 2. 
Result so far: 3804.107142
Subtract 56 from 80 to 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 13:
28 can be fit into 240 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 3804.1071428
Subtract 224 from 240 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 14:
28 goes into 160 5 times with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 3804.10714285
Subtract 140 from 160 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 3804.10714285, and the remainder is 2e-08.