We look at the division of 99570965 by 331 
The aim is to understand the frequency of 331 in 99570965.

Step 1:
9 divided by 331 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 331

Advancing to step 2:
If we divide 99 by 331, we get 0 and a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Append the next digit (5) from the dividend to 99 and continue with: 995 / 331

Going ahead to step 3:
The number 331 fits into 995 3 times, leaving a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 993 from 995 leaves us with 2.
Take the next digit (7) from the dividend and append it to 2, then repeat: 27 / 331

Going ahead to step 4:
331 can be fit into 27 0 times, resulting in a remainder of 27.
Put 0 as the next digit of the answer. 
Result so far: 30.0
If we subtract 0 from 27, we get 27.
Take the next digit (0) from the dividend and append it to 27, then repeat: 270 / 331

Advancing to step 5:
331 goes into 270 0 times with a remainder of 270.
The number 0 becomes the next digit in our result. 
Result so far: 300.0
The remainder is 270 after subtracting 0 from 270.
Grab the next digit (9) from the dividend, add it to 270, then carry on: 2709 / 331

On to step 6:
331 can be fit into 2709 8 times, resulting in a remainder of 61.
Put 8 as the next digit of the answer. 
Result so far: 3008.0
The remainder is 61 after subtracting 2648 from 2709.
Grab the next digit (6) from the dividend, add it to 61, then carry on: 616 / 331

Moving on to step 7:
The number 331 fits into 616 1 times, leaving a remainder of 285.
Put 1 as the next digit of the answer. 
Result so far: 30081.0
If we subtract 331 from 616, we get 285.
Fetch the next digit (5) from the dividend, attach it to 285 and continue: 2855 / 331

On to step 8:
When dividing 2855 by 331, we get 8 with a remainder of 207.
Write down 8 as next digit of the result. 
Result so far: 300818.0
Deduct 2648 from 2855 and we're left with 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Let's proceed to step 9:
2070 divided by 331 is 6 with a remainder of 84.
Write down 6 as next digit of the result. 
Result so far: 300818.6
Deduct 1986 from 2070 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 10:
When dividing 840 by 331, we get 2 with a remainder of 178.
Write down 2 as next digit of the result. 
Result so far: 300818.62
The remainder is 178 after subtracting 662 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Moving on to step 11:
If we divide 1780 by 331, we get 5 and a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 300818.625
If we take 1655 away from 1780, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 12:
331 goes into 1250 3 times with a remainder of 257.
Write down 3 as next digit of the result. 
Result so far: 300818.6253
The remainder is 257 after subtracting 993 from 1250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

On to step 13:
When dividing 2570 by 331, we get 7 with a remainder of 253.
Record the quotient 7 as the next digit in the result. 
Result so far: 300818.62537
Subtract 2317 from 2570 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Step 14:
If we divide 2530 by 331, we get 7 and a remainder of 213.
The number 7 becomes the next digit in our result. 
Result so far: 300818.625377
Subtract 2317 from 2530 to get 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

In conclusion, the division gives 300818.625377 with a balance of 2.13e-05.