We're dividing 68090230 by 28 
The aim is to understand the frequency of 28 in 68090230.

Going ahead to step 1:
If we divide 6 by 28, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 28

On to step 2:
When dividing 68 by 28, we get 2 with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 56 away from 68, we end up with 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 28

Step 3:
28 can be fit into 120 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 24.0
Subtract 112 from 120 to get 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 28

Step 4:
89 divided by 28 is 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 243.0
The remainder is 5 after subtracting 84 from 89.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 28

Advancing to step 5:
50 divided by 28 is 1 with a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 2431.0
If we take 28 away from 50, we end up with 22.
Bring next digit (2) of the dividend behind the 22 and repeat the process: 222 / 28

On to step 6:
28 can be fit into 222 7 times, resulting in a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 24317.0
Subtract 196 from 222 to get 26.
Take the next digit (3) from the dividend and append it to 26, then repeat: 263 / 28

Going ahead to step 7:
If we divide 263 by 28, we get 9 and a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 243179.0
Subtract 252 from 263 to get 11.
Append the next digit (0) from the dividend to 11 and continue with: 110 / 28

Moving on to step 8:
28 can be fit into 110 3 times, resulting in a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 2431793.0
Subtract 84 from 110 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
If we divide 260 by 28, we get 9 and a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 2431793.9
If we subtract 252 from 260, 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.

Going ahead to step 10:
28 can be fit into 80 2 times, resulting in a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 2431793.92
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.

Step 11:
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: 2431793.928
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.

Let's proceed to step 12:
When dividing 160 by 28, we get 5 with a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 2431793.9285
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.

Step 13:
When dividing 200 by 28, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 2431793.92857
If we subtract 196 from 200, we get 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 14:
28 can be fit into 40 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 2431793.928571
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 15:
If we divide 120 by 28, we get 4 and a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 2431793.9285714
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 16:
28 goes into 80 2 times with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 2431793.92857142
Subtract 56 from 80 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.

The final outcome is 2431793.92857142, with a leftover of 2.4e-08.