We divide 351979 by 99
The aim is to understand the frequency of 99 in 351979.

Step 1:
If we divide 3 by 99, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 99

On to step 2:
If we divide 35 by 99, we get 0 and a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Include the next digit (1) from the dividend after 35, then repeat: 351 / 99

On to step 3:
When dividing 351 by 99, we get 3 with a remainder of 54.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 297 from 351 leaves us with 54.
Bring next digit (9) of the dividend behind the 54 and repeat the process: 549 / 99

Let's proceed to step 4:
549 divided by 99 is 5 with a remainder of 54.
The next digit of our result is 5. 
Result so far: 35.0
Deduct 495 from 549 and we're left with 54.
Bring next digit (7) of the dividend behind the 54 and repeat the process: 547 / 99

Step 5:
If we divide 547 by 99, we get 5 and a remainder of 52.
The next digit of our result is 5. 
Result so far: 355.0
Subtract 495 from 547 to get 52.
Include the next digit (9) from the dividend after 52, then repeat: 529 / 99

Let's proceed to step 6:
529 divided by 99 is 5 with a remainder of 34.
The number 5 becomes the next digit in our result. 
Result so far: 3555.0
If we take 495 away from 529, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 7:
The number 99 fits into 340 3 times, leaving a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 3555.3
The remainder is 43 after subtracting 297 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 8:
If we divide 430 by 99, we get 4 and a remainder of 34.
The next digit of our result is 4. 
Result so far: 3555.34
Deduct 396 from 430 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 9:
340 divided by 99 is 3 with a remainder of 43.
Write down 3 as next digit of the result. 
Result so far: 3555.343
Subtracting 297 from 340 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 10:
99 goes into 430 4 times with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 3555.3434
Subtracting 396 from 430 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
When dividing 340 by 99, we get 3 with a remainder of 43.
The number 3 becomes the next digit in our result. 
Result so far: 3555.34343
Subtract 297 from 340 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 12:
99 goes into 430 4 times with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 3555.343434
Subtracting 396 from 430 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 13:
99 goes into 340 3 times with a remainder of 43.
Use 3 as the next digit of our solution. 
Result so far: 3555.3434343
Subtracting 297 from 340 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 14:
430 divided by 99 is 4 with a remainder of 34.
The next digit of our result is 4. 
Result so far: 3555.34343434
Subtracting 396 from 430 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

The final outcome is 3555.34343434, with a leftover of 3.4e-08.