We look at the division of 667386 by 28 
The aim is to understand the frequency of 28 in 667386.

Step 1:
28 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 28

Let's proceed to step 2:
66 divided by 28 is 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 56 away from 66, we end up with 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 28

Moving on to step 3:
107 divided by 28 is 3 with a remainder of 23.
Put 3 as the next digit of the answer. 
Result so far: 23.0
If we subtract 84 from 107, we get 23.
Append the next digit (3) from the dividend to 23 and continue with: 233 / 28

Let's proceed to step 4:
The number 28 fits into 233 8 times, leaving a remainder of 9.
The next digit of our result is 8. 
Result so far: 238.0
Subtracting 224 from 233 leaves us with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 28

Advancing to step 5:
28 goes into 98 3 times with a remainder of 14.
The next digit of our result is 3. 
Result so far: 2383.0
If we take 84 away from 98, we end up with 14.
Include the next digit (6) from the dividend after 14, then repeat: 146 / 28

On to step 6:
The number 28 fits into 146 5 times, leaving a remainder of 6.
Record the quotient 5 as the next digit in the result. 
Result so far: 23835.0
If we subtract 140 from 146, we 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.

On to step 7:
If we divide 60 by 28, we get 2 and a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 23835.2
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:
40 divided by 28 is 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 23835.21
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.

Let's proceed to step 9:
120 divided by 28 is 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 23835.214
Subtract 112 from 120 to 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.

Step 10:
80 divided by 28 is 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 23835.2142
The remainder is 24 after subtracting 56 from 80.
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 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: 23835.21428
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.

On to step 12:
28 can be fit into 160 5 times, resulting in a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 23835.214285
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:
28 goes into 200 7 times with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 23835.2142857
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:
The number 28 fits into 40 1 times, leaving a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 23835.21428571
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.

The final outcome is 23835.21428571, with a leftover of 1.2e-08.