We look at the division of 28108421 by 568 
The aim is to understand the frequency of 568 in 28108421.

Step 1:
When dividing 2 by 568, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 568

Let's proceed to step 2:
568 can be fit into 28 0 times, resulting in a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Grab the next digit (1) from the dividend, add it to 28, then carry on: 281 / 568

Advancing to step 3:
When dividing 281 by 568, we get 0 with a remainder of 281.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 281 after subtracting 0 from 281.
Append the next digit (0) from the dividend to 281 and continue with: 2810 / 568

Going ahead to step 4:
568 can be fit into 2810 4 times, resulting in a remainder of 538.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 2272 from 2810 to get 538.
Fetch the next digit (8) from the dividend, attach it to 538 and continue: 5388 / 568

Step 5:
When dividing 5388 by 568, we get 9 with a remainder of 276.
The next digit of our result is 9. 
Result so far: 49.0
The remainder is 276 after subtracting 5112 from 5388.
Take the next digit (4) from the dividend and append it to 276, then repeat: 2764 / 568

Advancing to step 6:
If we divide 2764 by 568, we get 4 and a remainder of 492.
Write down 4 as next digit of the result. 
Result so far: 494.0
Deduct 2272 from 2764 and we're left with 492.
Bring next digit (2) of the dividend behind the 492 and repeat the process: 4922 / 568

Let's proceed to step 7:
When dividing 4922 by 568, we get 8 with a remainder of 378.
Put 8 as the next digit of the answer. 
Result so far: 4948.0
The remainder is 378 after subtracting 4544 from 4922.
Grab the next digit (1) from the dividend, add it to 378, then carry on: 3781 / 568

Advancing to step 8:
3781 divided by 568 is 6 with a remainder of 373.
Write down 6 as next digit of the result. 
Result so far: 49486.0
Deduct 3408 from 3781 and we're left with 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Step 9:
When dividing 3730 by 568, we get 6 with a remainder of 322.
The number 6 becomes the next digit in our result. 
Result so far: 49486.6
Subtract 3408 from 3730 to get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Going ahead to step 10:
If we divide 3220 by 568, we get 5 and a remainder of 380.
The next digit of our result is 5. 
Result so far: 49486.65
The remainder is 380 after subtracting 2840 from 3220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Moving on to step 11:
568 goes into 3800 6 times with a remainder of 392.
Write down 6 as next digit of the result. 
Result so far: 49486.656
If we take 3408 away from 3800, we end up with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

On to step 12:
3920 divided by 568 is 6 with a remainder of 512.
Use 6 as the next digit of our solution. 
Result so far: 49486.6566
Deduct 3408 from 3920 and we're left with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

The final outcome is 49486.6566, with a leftover of 0.00512.