We divide 509492 by 28
The aim is to understand the frequency of 28 in 509492.

Advancing to step 1:
If we divide 5 by 28, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 28

On to step 2:
The number 28 fits into 50 1 times, leaving a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 22 after subtracting 28 from 50.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 28

Advancing to step 3:
229 divided by 28 is 8 with a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we take 224 away from 229, we end up with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 28

Going ahead to step 4:
54 divided by 28 is 1 with a remainder of 26.
Record the quotient 1 as the next digit in the result. 
Result so far: 181.0
If we subtract 28 from 54, we get 26.
Append the next digit (9) from the dividend to 26 and continue with: 269 / 28

Advancing to step 5:
When dividing 269 by 28, we get 9 with a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 1819.0
Subtract 252 from 269 to get 17.
Append the next digit (2) from the dividend to 17 and continue with: 172 / 28

Moving on to step 6:
The number 28 fits into 172 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 18196.0
Subtracting 168 from 172 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.

Step 7:
40 divided by 28 is 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 18196.1
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.

Advancing to step 8:
If we divide 120 by 28, we get 4 and a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 18196.14
If we take 112 away from 120, we end up 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.

Step 9:
28 can be fit into 80 2 times, resulting in a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 18196.142
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.

Let's proceed to step 10:
28 goes into 240 8 times with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 18196.1428
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.

Moving on to step 11:
If we divide 160 by 28, we get 5 and a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 18196.14285
Deduct 140 from 160 and we're left 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.

Let's proceed to step 12:
28 can be fit into 200 7 times, resulting in a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 18196.142857
If we take 196 away from 200, we end up 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.

On to step 13:
The number 28 fits into 40 1 times, leaving a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 18196.1428571
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 14:
The number 28 fits into 120 4 times, leaving a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 18196.14285714
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.

After the division, we end up with 18196.14285714 and a remainder of 8e-09.