Let's divide 72151969 by 311
The aim is to understand the frequency of 311 in 72151969.

Let's proceed to step 1:
7 divided by 311 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 311

On to step 2:
72 divided by 311 is 0 with a remainder of 72.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Grab the next digit (1) from the dividend, add it to 72, then carry on: 721 / 311

Moving on to step 3:
311 can be fit into 721 2 times, resulting in a remainder of 99.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 622 from 721, we get 99.
Include the next digit (5) from the dividend after 99, then repeat: 995 / 311

Advancing to step 4:
The number 311 fits into 995 3 times, leaving a remainder of 62.
The next digit of our result is 3. 
Result so far: 23.0
If we take 933 away from 995, we end up with 62.
Grab the next digit (1) from the dividend, add it to 62, then carry on: 621 / 311

On to step 5:
If we divide 621 by 311, we get 1 and a remainder of 310.
The next digit of our result is 1. 
Result so far: 231.0
The remainder is 310 after subtracting 311 from 621.
Grab the next digit (9) from the dividend, add it to 310, then carry on: 3109 / 311

Advancing to step 6:
The number 311 fits into 3109 9 times, leaving a remainder of 310.
Record the quotient 9 as the next digit in the result. 
Result so far: 2319.0
If we subtract 2799 from 3109, we get 310.
Fetch the next digit (6) from the dividend, attach it to 310 and continue: 3106 / 311

Step 7:
3106 divided by 311 is 9 with a remainder of 307.
The number 9 becomes the next digit in our result. 
Result so far: 23199.0
The remainder is 307 after subtracting 2799 from 3106.
Append the next digit (9) from the dividend to 307 and continue with: 3079 / 311

Step 8:
The number 311 fits into 3079 9 times, leaving a remainder of 280.
Put 9 as the next digit of the answer. 
Result so far: 231999.0
If we subtract 2799 from 3079, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 9:
The number 311 fits into 2800 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 231999.9
Subtract 2799 from 2800 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 10:
10 divided by 311 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 231999.9
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
When dividing 100 by 311, we get 0 with a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 231999.9
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 231999.9, with a leftover of 0.01.