We look at the division of 667043 by 28 
The aim is to understand the frequency of 28 in 667043.

Step 1:
The number 28 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 28

Moving on to step 2:
28 can be fit into 66 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 10 after subtracting 56 from 66.
Fetch the next digit (7) from the dividend, attach it to 10 and continue: 107 / 28

Going ahead to step 3:
If we divide 107 by 28, we get 3 and a remainder of 23.
The next digit of our result is 3. 
Result so far: 23.0
If we subtract 84 from 107, we get 23.
Include the next digit (0) from the dividend after 23, then repeat: 230 / 28

Step 4:
28 goes into 230 8 times with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 238.0
Subtracting 224 from 230 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 28

Moving on to step 5:
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: 2382.0
If we subtract 56 from 64, we get 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 28

Going ahead to step 6:
If we divide 83 by 28, we get 2 and a remainder of 27.
Write down 2 as next digit of the result. 
Result so far: 23822.0
If we subtract 56 from 83, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 7:
If we divide 270 by 28, we get 9 and a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 23822.9
If we take 252 away from 270, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
When dividing 180 by 28, we get 6 with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 23822.96
Deduct 168 from 180 and we're left 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 9:
120 divided by 28 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 23822.964
Deduct 112 from 120 and we're left 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.

Moving on to step 10:
The number 28 fits into 80 2 times, leaving a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 23822.9642
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.

On to step 11:
28 can be fit into 240 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 23822.96428
Subtract 224 from 240 to 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.

Advancing to step 12:
The number 28 fits into 160 5 times, leaving a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 23822.964285
Deduct 140 from 160 and we're left 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.

On to step 13:
28 goes into 200 7 times with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 23822.9642857
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.

On to step 14:
28 goes into 40 1 times with a remainder of 12.
The next digit of our result is 1. 
Result so far: 23822.96428571
If we take 28 away from 40, we end up 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.

The final outcome is 23822.96428571, with a leftover of 1.2e-08.