We're dividing 21849 by 28 
The aim is to understand the frequency of 28 in 21849.

Step 1:
When dividing 2 by 28, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 28

Moving on to step 2:
If we divide 21 by 28, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 28

Moving on to step 3:
If we divide 218 by 28, we get 7 and a remainder of 22.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 196 from 218 to get 22.
Bring next digit (4) of the dividend behind the 22 and repeat the process: 224 / 28

Let's proceed to step 4:
When dividing 224 by 28, we get 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 78.0
The remainder is 0 after subtracting 224 from 224.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 28

Moving on to step 5:
The number 28 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 780.0
If we subtract 0 from 9, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 6:
90 divided by 28 is 3 with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 780.3
Subtract 84 from 90 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.

Going ahead to step 7:
60 divided by 28 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 780.32
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.

Advancing to step 8:
The number 28 fits into 40 1 times, leaving a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 780.321
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.

Moving on to step 9:
If we divide 120 by 28, we get 4 and a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 780.3214
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.

Let's proceed to step 10:
80 divided by 28 is 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 780.32142
Deduct 56 from 80 and we're left 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 11:
240 divided by 28 is 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 780.321428
Deduct 224 from 240 and we're left 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.

Advancing to step 12:
If we divide 160 by 28, we get 5 and a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 780.3214285
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.

Advancing to step 13:
If we divide 200 by 28, we get 7 and a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 780.32142857
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.

In conclusion, the division gives 780.32142857 with a balance of 4e-09.