We look at the division of 28906186 by 438 
The aim is to understand the frequency of 438 in 28906186.

Going ahead to step 1:
2 divided by 438 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 438

Let's proceed to step 2:
The number 438 fits into 28 0 times, leaving a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Take the next digit (9) from the dividend and append it to 28, then repeat: 289 / 438

Advancing to step 3:
438 goes into 289 0 times with a remainder of 289.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 289 after subtracting 0 from 289.
Fetch the next digit (0) from the dividend, attach it to 289 and continue: 2890 / 438

Moving on to step 4:
If we divide 2890 by 438, we get 6 and a remainder of 262.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 2628 from 2890 and we're left with 262.
Append the next digit (6) from the dividend to 262 and continue with: 2626 / 438

Advancing to step 5:
The number 438 fits into 2626 5 times, leaving a remainder of 436.
Write down 5 as next digit of the result. 
Result so far: 65.0
Subtracting 2190 from 2626 leaves us with 436.
Include the next digit (1) from the dividend after 436, then repeat: 4361 / 438

Advancing to step 6:
The number 438 fits into 4361 9 times, leaving a remainder of 419.
The next digit of our result is 9. 
Result so far: 659.0
Subtracting 3942 from 4361 leaves us with 419.
Bring next digit (8) of the dividend behind the 419 and repeat the process: 4198 / 438

Let's proceed to step 7:
438 goes into 4198 9 times with a remainder of 256.
Write down 9 as next digit of the result. 
Result so far: 6599.0
Deduct 3942 from 4198 and we're left with 256.
Take the next digit (6) from the dividend and append it to 256, then repeat: 2566 / 438

On to step 8:
If we divide 2566 by 438, we get 5 and a remainder of 376.
Use 5 as the next digit of our solution. 
Result so far: 65995.0
The remainder is 376 after subtracting 2190 from 2566.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Step 9:
3760 divided by 438 is 8 with a remainder of 256.
The next digit of our result is 8. 
Result so far: 65995.8
The remainder is 256 after subtracting 3504 from 3760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 10:
438 goes into 2560 5 times with a remainder of 370.
The next digit of our result is 5. 
Result so far: 65995.85
Deduct 2190 from 2560 and we're left with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Let's proceed to step 11:
438 can be fit into 3700 8 times, resulting in a remainder of 196.
The number 8 becomes the next digit in our result. 
Result so far: 65995.858
Deduct 3504 from 3700 and we're left with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Advancing to step 12:
1960 divided by 438 is 4 with a remainder of 208.
The next digit of our result is 4. 
Result so far: 65995.8584
If we take 1752 away from 1960, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

On to step 13:
438 can be fit into 2080 4 times, resulting in a remainder of 328.
The number 4 becomes the next digit in our result. 
Result so far: 65995.85844
Subtracting 1752 from 2080 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

The final result is 65995.85844 with a remainder of 0.000328.