987903 divided by 99 
The aim is to understand the frequency of 99 in 987903.

Going ahead to step 1:
If we divide 9 by 99, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 99

On to step 2:
99 can be fit into 98 0 times, resulting in a remainder of 98.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 98 leaves us with 98.
Take the next digit (7) from the dividend and append it to 98, then repeat: 987 / 99

Moving on to step 3:
If we divide 987 by 99, we get 9 and a remainder of 96.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 891 from 987 and we're left with 96.
Append the next digit (9) from the dividend to 96 and continue with: 969 / 99

Step 4:
The number 99 fits into 969 9 times, leaving a remainder of 78.
Record the quotient 9 as the next digit in the result. 
Result so far: 99.0
Subtracting 891 from 969 leaves us with 78.
Append the next digit (0) from the dividend to 78 and continue with: 780 / 99

Advancing to step 5:
99 can be fit into 780 7 times, resulting in a remainder of 87.
Use 7 as the next digit of our solution. 
Result so far: 997.0
The remainder is 87 after subtracting 693 from 780.
Bring next digit (3) of the dividend behind the 87 and repeat the process: 873 / 99

Going ahead to step 6:
99 goes into 873 8 times with a remainder of 81.
Record the quotient 8 as the next digit in the result. 
Result so far: 9978.0
If we take 792 away from 873, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 7:
When dividing 810 by 99, we get 8 with a remainder of 18.
The next digit of our result is 8. 
Result so far: 9978.8
If we take 792 away from 810, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 8:
When dividing 180 by 99, we get 1 with a remainder of 81.
Use 1 as the next digit of our solution. 
Result so far: 9978.81
Deduct 99 from 180 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Advancing to step 9:
If we divide 810 by 99, we get 8 and a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 9978.818
The remainder is 18 after subtracting 792 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 10:
99 goes into 180 1 times with a remainder of 81.
Record the quotient 1 as the next digit in the result. 
Result so far: 9978.8181
If we subtract 99 from 180, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 11:
The number 99 fits into 810 8 times, leaving a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 9978.81818
Deduct 792 from 810 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 12:
When dividing 180 by 99, we get 1 with a remainder of 81.
The number 1 becomes the next digit in our result. 
Result so far: 9978.818181
If we subtract 99 from 180, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 13:
The number 99 fits into 810 8 times, leaving a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 9978.8181818
If we take 792 away from 810, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 14:
The number 99 fits into 180 1 times, leaving a remainder of 81.
Put 1 as the next digit of the answer. 
Result so far: 9978.81818181
If we subtract 99 from 180, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

In conclusion, the division gives 9978.81818181 with a balance of 8.1e-08.