We look at the division of 555809 by 28 
The aim is to understand the frequency of 28 in 555809.

Going ahead to step 1:
The number 28 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 28

Let's proceed to step 2:
28 can be fit into 55 1 times, resulting in a remainder of 27.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 28 from 55 and we're left with 27.
Grab the next digit (5) from the dividend, add it to 27, then carry on: 275 / 28

Advancing to step 3:
28 can be fit into 275 9 times, resulting in a remainder of 23.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
Subtracting 252 from 275 leaves us with 23.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 28

Going ahead to step 4:
238 divided by 28 is 8 with a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 198.0
Subtracting 224 from 238 leaves us with 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 28

Advancing to step 5:
When dividing 140 by 28, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1985.0
If we take 140 away from 140, we end up with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 28

Advancing to step 6:
When dividing 9 by 28, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 19850.0
If we take 0 away from 9, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
If we divide 90 by 28, we get 3 and a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 19850.3
If we subtract 84 from 90, 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.

On to step 8:
If we divide 60 by 28, we get 2 and a remainder of 4.
The next digit of our result is 2. 
Result so far: 19850.32
If we take 56 away from 60, 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.

Let's proceed to step 9:
40 divided by 28 is 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 19850.321
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.

On to step 10:
If we divide 120 by 28, we get 4 and a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 19850.3214
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.

Advancing to step 11:
When dividing 80 by 28, we get 2 with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 19850.32142
The remainder is 24 after subtracting 56 from 80.
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 12:
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: 19850.321428
The remainder is 16 after subtracting 224 from 240.
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 13:
If we divide 160 by 28, we get 5 and a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 19850.3214285
If we take 140 away from 160, we end up 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.

Advancing to step 14:
200 divided by 28 is 7 with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 19850.32142857
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.

The final outcome is 19850.32142857, with a leftover of 4e-09.