72706532 ÷ 909 
The aim is to understand the frequency of 909 in 72706532.

On to step 1:
The number 909 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 909

Moving on to step 2:
909 can be fit into 72 0 times, resulting in a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Bring next digit (7) of the dividend behind the 72 and repeat the process: 727 / 909

Going ahead to step 3:
909 can be fit into 727 0 times, resulting in a remainder of 727.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 727 after subtracting 0 from 727.
Fetch the next digit (0) from the dividend, attach it to 727 and continue: 7270 / 909

Moving on to step 4:
909 can be fit into 7270 7 times, resulting in a remainder of 907.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 6363 from 7270 to get 907.
Append the next digit (6) from the dividend to 907 and continue with: 9076 / 909

Going ahead to step 5:
If we divide 9076 by 909, we get 9 and a remainder of 895.
The next digit of our result is 9. 
Result so far: 79.0
The remainder is 895 after subtracting 8181 from 9076.
Grab the next digit (5) from the dividend, add it to 895, then carry on: 8955 / 909

Step 6:
When dividing 8955 by 909, we get 9 with a remainder of 774.
The number 9 becomes the next digit in our result. 
Result so far: 799.0
Subtract 8181 from 8955 to get 774.
Take the next digit (3) from the dividend and append it to 774, then repeat: 7743 / 909

On to step 7:
909 can be fit into 7743 8 times, resulting in a remainder of 471.
The next digit of our result is 8. 
Result so far: 7998.0
If we subtract 7272 from 7743, we get 471.
Bring next digit (2) of the dividend behind the 471 and repeat the process: 4712 / 909

Step 8:
4712 divided by 909 is 5 with a remainder of 167.
Put 5 as the next digit of the answer. 
Result so far: 79985.0
If we subtract 4545 from 4712, we get 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Moving on to step 9:
909 can be fit into 1670 1 times, resulting in a remainder of 761.
The number 1 becomes the next digit in our result. 
Result so far: 79985.1
If we take 909 away from 1670, we end up with 761.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7610, and continue the process.

Moving on to step 10:
The number 909 fits into 7610 8 times, leaving a remainder of 338.
Put 8 as the next digit of the answer. 
Result so far: 79985.18
Deduct 7272 from 7610 and we're left with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Going ahead to step 11:
If we divide 3380 by 909, we get 3 and a remainder of 653.
Record the quotient 3 as the next digit in the result. 
Result so far: 79985.183
Subtract 2727 from 3380 to get 653.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

Moving on to step 12:
When dividing 6530 by 909, we get 7 with a remainder of 167.
The number 7 becomes the next digit in our result. 
Result so far: 79985.1837
If we subtract 6363 from 6530, we get 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Step 13:
The number 909 fits into 1670 1 times, leaving a remainder of 761.
The number 1 becomes the next digit in our result. 
Result so far: 79985.18371
Subtract 909 from 1670 to get 761.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7610, and continue the process.

Going ahead to step 14:
If we divide 7610 by 909, we get 8 and a remainder of 338.
The next digit of our result is 8. 
Result so far: 79985.183718
Deduct 7272 from 7610 and we're left with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Let's proceed to step 15:
3380 divided by 909 is 3 with a remainder of 653.
The number 3 becomes the next digit in our result. 
Result so far: 79985.1837183
If we subtract 2727 from 3380, we get 653.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

Moving on to step 16:
When dividing 6530 by 909, we get 7 with a remainder of 167.
The number 7 becomes the next digit in our result. 
Result so far: 79985.18371837
Deduct 6363 from 6530 and we're left with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

The final outcome is 79985.18371837, with a leftover of 1.67e-07.