We look at the division of 808561 by 72 
The aim is to understand the frequency of 72 in 808561.

On to step 1:
When dividing 8 by 72, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 72

Step 2:
When dividing 80 by 72, we get 1 with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 72 from 80 leaves us with 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 72

On to step 3:
72 can be fit into 88 1 times, resulting in a remainder of 16.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 72 from 88 to get 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 72

Let's proceed to step 4:
72 can be fit into 165 2 times, resulting in a remainder of 21.
Put 2 as the next digit of the answer. 
Result so far: 112.0
If we subtract 144 from 165, we get 21.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 72

Going ahead to step 5:
72 can be fit into 216 3 times, resulting in a remainder of 0.
The next digit of our result is 3. 
Result so far: 1123.0
The remainder is 0 after subtracting 216 from 216.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 72

Let's proceed to step 6:
The number 72 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 11230.0
Deduct 0 from 1 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
72 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 11230.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
If we divide 100 by 72, we get 1 and a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 11230.01
Subtracting 72 from 100 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
72 goes into 280 3 times with a remainder of 64.
Write down 3 as next digit of the result. 
Result so far: 11230.013
The remainder is 64 after subtracting 216 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 10:
640 divided by 72 is 8 with a remainder of 64.
Use 8 as the next digit of our solution. 
Result so far: 11230.0138
If we take 576 away from 640, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 11:
If we divide 640 by 72, we get 8 and a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 11230.01388
If we take 576 away from 640, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

In conclusion, the division gives 11230.01388 with a balance of 6.4e-05.