Let's divide 648863 by 28
The aim is to understand the frequency of 28 in 648863.

Advancing to step 1:
28 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 28

On to step 2:
If we divide 64 by 28, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 56 from 64 to get 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 28

Going ahead to step 3:
If we divide 88 by 28, we get 3 and a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 23.0
Subtracting 84 from 88 leaves us with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 28

Moving on to step 4:
28 goes into 48 1 times with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 231.0
Subtracting 28 from 48 leaves us with 20.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 28

Let's proceed to step 5:
If we divide 206 by 28, we get 7 and a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 2317.0
Subtracting 196 from 206 leaves us with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 28

Moving on to step 6:
When dividing 103 by 28, we get 3 with a remainder of 19.
The next digit of our result is 3. 
Result so far: 23173.0
Deduct 84 from 103 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
28 goes into 190 6 times with a remainder of 22.
The number 6 becomes the next digit in our result. 
Result so far: 23173.6
The remainder is 22 after subtracting 168 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 8:
220 divided by 28 is 7 with a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 23173.67
Subtract 196 from 220 to 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 9:
If we divide 240 by 28, we get 8 and a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 23173.678
If we subtract 224 from 240, 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.

Step 10:
28 goes into 160 5 times with a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 23173.6785
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.

Moving on to step 11:
200 divided by 28 is 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 23173.67857
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.

Let's proceed to step 12:
If we divide 40 by 28, we get 1 and a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 23173.678571
Subtracting 28 from 40 leaves us 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 13:
28 can be fit into 120 4 times, resulting in a remainder of 8.
The next digit of our result is 4. 
Result so far: 23173.6785714
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.

Going ahead to step 14:
28 can be fit into 80 2 times, resulting in a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 23173.67857142
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.

After the division, we end up with 23173.67857142 and a remainder of 2.4e-08.