We look at the division of 234086 by 909 
The aim is to understand the frequency of 909 in 234086.

On to step 1:
The number 909 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 909

Let's proceed to step 2:
The number 909 fits into 23 0 times, leaving a remainder of 23.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 23, we end up with 23.
Append the next digit (4) from the dividend to 23 and continue with: 234 / 909

Going ahead to step 3:
The number 909 fits into 234 0 times, leaving a remainder of 234.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 234 and we're left with 234.
Include the next digit (0) from the dividend after 234, then repeat: 2340 / 909

Advancing to step 4:
If we divide 2340 by 909, we get 2 and a remainder of 522.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 1818 from 2340 and we're left with 522.
Bring next digit (8) of the dividend behind the 522 and repeat the process: 5228 / 909

On to step 5:
909 can be fit into 5228 5 times, resulting in a remainder of 683.
The next digit of our result is 5. 
Result so far: 25.0
Subtracting 4545 from 5228 leaves us with 683.
Take the next digit (6) from the dividend and append it to 683, then repeat: 6836 / 909

Moving on to step 6:
909 can be fit into 6836 7 times, resulting in a remainder of 473.
Use 7 as the next digit of our solution. 
Result so far: 257.0
Subtract 6363 from 6836 to get 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Moving on to step 7:
909 goes into 4730 5 times with a remainder of 185.
Use 5 as the next digit of our solution. 
Result so far: 257.5
Subtracting 4545 from 4730 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 8:
909 goes into 1850 2 times with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 257.52
The remainder is 32 after subtracting 1818 from 1850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 9:
909 goes into 320 0 times with a remainder of 320.
The number 0 becomes the next digit in our result. 
Result so far: 257.52
The remainder is 320 after subtracting 0 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 10:
If we divide 3200 by 909, we get 3 and a remainder of 473.
The number 3 becomes the next digit in our result. 
Result so far: 257.5203
The remainder is 473 after subtracting 2727 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Going ahead to step 11:
4730 divided by 909 is 5 with a remainder of 185.
The number 5 becomes the next digit in our result. 
Result so far: 257.52035
Deduct 4545 from 4730 and we're left with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Step 12:
The number 909 fits into 1850 2 times, leaving a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 257.520352
Deduct 1818 from 1850 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 13:
909 can be fit into 320 0 times, resulting in a remainder of 320.
Write down 0 as next digit of the result. 
Result so far: 257.520352
If we subtract 0 from 320, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 14:
The number 909 fits into 3200 3 times, leaving a remainder of 473.
Record the quotient 3 as the next digit in the result. 
Result so far: 257.52035203
If we take 2727 away from 3200, we end up with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

The final result is 257.52035203 with a remainder of 4.73e-07.