We're dividing 10506 by 28 
The aim is to understand the frequency of 28 in 10506.

Let's proceed to step 1:
If we divide 1 by 28, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 28

Moving on to step 2:
When dividing 10 by 28, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 10 leaves us with 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 28

On to step 3:
The number 28 fits into 105 3 times, leaving a remainder of 21.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 84 away from 105, we end up with 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 28

Moving on to step 4:
210 divided by 28 is 7 with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
If we subtract 196 from 210, we get 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 28

Step 5:
146 divided by 28 is 5 with a remainder of 6.
The next digit of our result is 5. 
Result so far: 375.0
Subtract 140 from 146 to 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.

On to step 6:
The number 28 fits into 60 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 375.2
Deduct 56 from 60 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 7:
28 goes into 40 1 times with a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 375.21
Deduct 28 from 40 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
120 divided by 28 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 375.214
If we subtract 112 from 120, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
80 divided by 28 is 2 with a remainder of 24.
The next digit of our result is 2. 
Result so far: 375.2142
If we subtract 56 from 80, 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.

Going ahead to step 10:
28 goes into 240 8 times with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 375.21428
If we take 224 away from 240, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 11:
160 divided by 28 is 5 with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 375.214285
Subtracting 140 from 160 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
200 divided by 28 is 7 with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 375.2142857
Subtracting 196 from 200 leaves us 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 13:
When dividing 40 by 28, we get 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 375.21428571
If we subtract 28 from 40, 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.

The quotient of the division is 375.21428571, and the remainder is 1.2e-08.