172355 ÷ 28 
The aim is to understand the frequency of 28 in 172355.

On to step 1:
If we divide 1 by 28, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 28

Let's proceed to step 2:
If we divide 17 by 28, we get 0 and a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 28

Let's proceed to step 3:
28 goes into 172 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 168 from 172, we get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 28

Going ahead to step 4:
If we divide 43 by 28, we get 1 and a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 61.0
The remainder is 15 after subtracting 28 from 43.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 28

Let's proceed to step 5:
155 divided by 28 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 615.0
Subtracting 140 from 155 leaves us with 15.
Include the next digit (5) from the dividend after 15, then repeat: 155 / 28

Going ahead to step 6:
28 goes into 155 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 6155.0
If we subtract 140 from 155, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
28 can be fit into 150 5 times, resulting in a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 6155.5
Deduct 140 from 150 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
The number 28 fits into 100 3 times, leaving a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 6155.53
If we subtract 84 from 100, we 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.

Advancing to step 9:
28 goes into 160 5 times with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 6155.535
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.

Moving on to step 10:
28 can be fit into 200 7 times, resulting in a remainder of 4.
The next digit of our result is 7. 
Result so far: 6155.5357
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 11:
28 goes into 40 1 times with a remainder of 12.
The next digit of our result is 1. 
Result so far: 6155.53571
If we take 28 away from 40, we end up 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 12:
When dividing 120 by 28, we get 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 6155.535714
The remainder is 8 after subtracting 112 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 13:
When dividing 80 by 28, we get 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 6155.5357142
Subtracting 56 from 80 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 14:
The number 28 fits into 240 8 times, leaving a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 6155.53571428
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.

After the division, we end up with 6155.53571428 and a remainder of 1.6e-08.