We look at the division of 83951 by 99 
The aim is to understand the frequency of 99 in 83951.

Step 1:
99 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 99

On to step 2:
If we divide 83 by 99, we get 0 and a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 83 after subtracting 0 from 83.
Append the next digit (9) from the dividend to 83 and continue with: 839 / 99

Moving on to step 3:
99 can be fit into 839 8 times, resulting in a remainder of 47.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 792 from 839 to get 47.
Grab the next digit (5) from the dividend, add it to 47, then carry on: 475 / 99

On to step 4:
If we divide 475 by 99, we get 4 and a remainder of 79.
Record the quotient 4 as the next digit in the result. 
Result so far: 84.0
The remainder is 79 after subtracting 396 from 475.
Grab the next digit (1) from the dividend, add it to 79, then carry on: 791 / 99

Advancing to step 5:
99 goes into 791 7 times with a remainder of 98.
The next digit of our result is 7. 
Result so far: 847.0
Subtracting 693 from 791 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 6:
980 divided by 99 is 9 with a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 847.9
If we subtract 891 from 980, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 7:
99 goes into 890 8 times with a remainder of 98.
The next digit of our result is 8. 
Result so far: 847.98
If we subtract 792 from 890, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 8:
If we divide 980 by 99, we get 9 and a remainder of 89.
The number 9 becomes the next digit in our result. 
Result so far: 847.989
Deduct 891 from 980 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 9:
If we divide 890 by 99, we get 8 and a remainder of 98.
Use 8 as the next digit of our solution. 
Result so far: 847.9898
Subtracting 792 from 890 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 10:
When dividing 980 by 99, we get 9 with a remainder of 89.
The next digit of our result is 9. 
Result so far: 847.98989
If we subtract 891 from 980, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 11:
The number 99 fits into 890 8 times, leaving a remainder of 98.
Write down 8 as next digit of the result. 
Result so far: 847.989898
The remainder is 98 after subtracting 792 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 12:
99 can be fit into 980 9 times, resulting in a remainder of 89.
The number 9 becomes the next digit in our result. 
Result so far: 847.9898989
If we take 891 away from 980, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 13:
The number 99 fits into 890 8 times, leaving a remainder of 98.
The number 8 becomes the next digit in our result. 
Result so far: 847.98989898
Subtract 792 from 890 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

In conclusion, the division gives 847.98989898 with a balance of 9.8e-08.