We're dividing 351159 by 99 
The aim is to understand the frequency of 99 in 351159.

Let's proceed to step 1:
When dividing 3 by 99, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 99

Let's proceed to step 2:
The number 99 fits into 35 0 times, leaving a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 35, we end up with 35.
Take the next digit (1) from the dividend and append it to 35, then repeat: 351 / 99

On to step 3:
When dividing 351 by 99, we get 3 with a remainder of 54.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 297 from 351 leaves us with 54.
Append the next digit (1) from the dividend to 54 and continue with: 541 / 99

Moving on to step 4:
When dividing 541 by 99, we get 5 with a remainder of 46.
Put 5 as the next digit of the answer. 
Result so far: 35.0
If we take 495 away from 541, we end up with 46.
Bring next digit (5) of the dividend behind the 46 and repeat the process: 465 / 99

Going ahead to step 5:
The number 99 fits into 465 4 times, leaving a remainder of 69.
The number 4 becomes the next digit in our result. 
Result so far: 354.0
The remainder is 69 after subtracting 396 from 465.
Append the next digit (9) from the dividend to 69 and continue with: 699 / 99

Going ahead to step 6:
699 divided by 99 is 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 3547.0
If we subtract 693 from 699, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
99 goes into 60 0 times with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 3547.0
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
When dividing 600 by 99, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 3547.06
Subtract 594 from 600 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 9:
If we divide 60 by 99, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 3547.06
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 10:
99 can be fit into 600 6 times, resulting in a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 3547.0606
If we take 594 away from 600, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
If we divide 60 by 99, we get 0 and a remainder of 60.
The next digit of our result is 0. 
Result so far: 3547.0606
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
When dividing 600 by 99, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 3547.060606
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 13:
99 can be fit into 60 0 times, resulting in a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 3547.060606
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 14:
99 goes into 600 6 times with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 3547.06060606
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 3547.06060606 with a remainder of 6e-09.