Let's divide 72359631 by 813
The aim is to understand the frequency of 813 in 72359631.

Going ahead to step 1:
813 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 813

Moving on to step 2:
The number 813 fits into 72 0 times, leaving a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Include the next digit (3) from the dividend after 72, then repeat: 723 / 813

Let's proceed to step 3:
813 can be fit into 723 0 times, resulting in a remainder of 723.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 723 leaves us with 723.
Append the next digit (5) from the dividend to 723 and continue with: 7235 / 813

Moving on to step 4:
813 goes into 7235 8 times with a remainder of 731.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 6504 away from 7235, we end up with 731.
Take the next digit (9) from the dividend and append it to 731, then repeat: 7319 / 813

Advancing to step 5:
The number 813 fits into 7319 9 times, leaving a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 89.0
The remainder is 2 after subtracting 7317 from 7319.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 813

Advancing to step 6:
When dividing 26 by 813, we get 0 with a remainder of 26.
Use 0 as the next digit of our solution. 
Result so far: 890.0
The remainder is 26 after subtracting 0 from 26.
Fetch the next digit (3) from the dividend, attach it to 26 and continue: 263 / 813

Moving on to step 7:
The number 813 fits into 263 0 times, leaving a remainder of 263.
The number 0 becomes the next digit in our result. 
Result so far: 8900.0
Subtract 0 from 263 to get 263.
Include the next digit (1) from the dividend after 263, then repeat: 2631 / 813

Advancing to step 8:
When dividing 2631 by 813, we get 3 with a remainder of 192.
Write down 3 as next digit of the result. 
Result so far: 89003.0
Subtracting 2439 from 2631 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 9:
When dividing 1920 by 813, we get 2 with a remainder of 294.
Put 2 as the next digit of the answer. 
Result so far: 89003.2
Deduct 1626 from 1920 and we're left with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Step 10:
813 can be fit into 2940 3 times, resulting in a remainder of 501.
The next digit of our result is 3. 
Result so far: 89003.23
Deduct 2439 from 2940 and we're left with 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Advancing to step 11:
813 goes into 5010 6 times with a remainder of 132.
The next digit of our result is 6. 
Result so far: 89003.236
If we subtract 4878 from 5010, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Let's proceed to step 12:
When dividing 1320 by 813, we get 1 with a remainder of 507.
The number 1 becomes the next digit in our result. 
Result so far: 89003.2361
Subtracting 813 from 1320 leaves us with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Going ahead to step 13:
813 can be fit into 5070 6 times, resulting in a remainder of 192.
Put 6 as the next digit of the answer. 
Result so far: 89003.23616
Subtracting 4878 from 5070 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Moving on to step 14:
1920 divided by 813 is 2 with a remainder of 294.
Record the quotient 2 as the next digit in the result. 
Result so far: 89003.236162
The remainder is 294 after subtracting 1626 from 1920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Moving on to step 15:
813 goes into 2940 3 times with a remainder of 501.
Record the quotient 3 as the next digit in the result. 
Result so far: 89003.2361623
The remainder is 501 after subtracting 2439 from 2940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Moving on to step 16:
813 can be fit into 5010 6 times, resulting in a remainder of 132.
The next digit of our result is 6. 
Result so far: 89003.23616236
Subtract 4878 from 5010 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

The final result is 89003.23616236 with a remainder of 1.32e-07.