We look at the division of 9124514 by 909 
The aim is to understand the frequency of 909 in 9124514.

On to step 1:
909 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 909

Step 2:
When dividing 91 by 909, we get 0 with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Include the next digit (2) from the dividend after 91, then repeat: 912 / 909

Step 3:
If we divide 912 by 909, we get 1 and a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 909 away from 912, we end up with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 909

Going ahead to step 4:
34 divided by 909 is 0 with a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 34, we get 34.
Append the next digit (5) from the dividend to 34 and continue with: 345 / 909

Advancing to step 5:
The number 909 fits into 345 0 times, leaving a remainder of 345.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we subtract 0 from 345, we get 345.
Include the next digit (1) from the dividend after 345, then repeat: 3451 / 909

Let's proceed to step 6:
The number 909 fits into 3451 3 times, leaving a remainder of 724.
Record the quotient 3 as the next digit in the result. 
Result so far: 1003.0
Deduct 2727 from 3451 and we're left with 724.
Include the next digit (4) from the dividend after 724, then repeat: 7244 / 909

Let's proceed to step 7:
909 goes into 7244 7 times with a remainder of 881.
Use 7 as the next digit of our solution. 
Result so far: 10037.0
Subtracting 6363 from 7244 leaves us with 881.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8810, and continue the process.

Going ahead to step 8:
If we divide 8810 by 909, we get 9 and a remainder of 629.
Put 9 as the next digit of the answer. 
Result so far: 10037.9
If we subtract 8181 from 8810, we get 629.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6290, and continue the process.

Let's proceed to step 9:
6290 divided by 909 is 6 with a remainder of 836.
The number 6 becomes the next digit in our result. 
Result so far: 10037.96
If we subtract 5454 from 6290, we get 836.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8360, and continue the process.

Moving on to step 10:
The number 909 fits into 8360 9 times, leaving a remainder of 179.
Put 9 as the next digit of the answer. 
Result so far: 10037.969
If we take 8181 away from 8360, we end up with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

On to step 11:
1790 divided by 909 is 1 with a remainder of 881.
Put 1 as the next digit of the answer. 
Result so far: 10037.9691
Subtracting 909 from 1790 leaves us with 881.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8810, and continue the process.

On to step 12:
909 goes into 8810 9 times with a remainder of 629.
Write down 9 as next digit of the result. 
Result so far: 10037.96919
If we subtract 8181 from 8810, we get 629.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6290, and continue the process.

Let's proceed to step 13:
The number 909 fits into 6290 6 times, leaving a remainder of 836.
Record the quotient 6 as the next digit in the result. 
Result so far: 10037.969196
If we take 5454 away from 6290, we end up with 836.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8360, and continue the process.

Moving on to step 14:
909 can be fit into 8360 9 times, resulting in a remainder of 179.
Use 9 as the next digit of our solution. 
Result so far: 10037.9691969
If we take 8181 away from 8360, we end up with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Going ahead to step 15:
When dividing 1790 by 909, we get 1 with a remainder of 881.
Write down 1 as next digit of the result. 
Result so far: 10037.96919691
Subtract 909 from 1790 to get 881.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8810, and continue the process.

After the division, we end up with 10037.96919691 and a remainder of 8.81e-07.