We look at the division of 535549 by 99 
The aim is to understand the frequency of 99 in 535549.

Let's proceed to step 1:
99 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 99

On to step 2:
The number 99 fits into 53 0 times, leaving a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Append the next digit (5) from the dividend to 53 and continue with: 535 / 99

Moving on to step 3:
99 can be fit into 535 5 times, resulting in a remainder of 40.
The next digit of our result is 5. 
Result so far: 5.0
If we take 495 away from 535, we end up with 40.
Grab the next digit (5) from the dividend, add it to 40, then carry on: 405 / 99

Going ahead to step 4:
When dividing 405 by 99, we get 4 with a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 54.0
If we take 396 away from 405, we end up with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 99

Going ahead to step 5:
99 can be fit into 94 0 times, resulting in a remainder of 94.
Record the quotient 0 as the next digit in the result. 
Result so far: 540.0
Subtracting 0 from 94 leaves us with 94.
Include the next digit (9) from the dividend after 94, then repeat: 949 / 99

Moving on to step 6:
If we divide 949 by 99, we get 9 and a remainder of 58.
The number 9 becomes the next digit in our result. 
Result so far: 5409.0
The remainder is 58 after subtracting 891 from 949.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 7:
580 divided by 99 is 5 with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 5409.5
Deduct 495 from 580 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 8:
The number 99 fits into 850 8 times, leaving a remainder of 58.
The next digit of our result is 8. 
Result so far: 5409.58
If we take 792 away from 850, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 9:
The number 99 fits into 580 5 times, leaving a remainder of 85.
Put 5 as the next digit of the answer. 
Result so far: 5409.585
Subtract 495 from 580 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 10:
The number 99 fits into 850 8 times, leaving a remainder of 58.
Put 8 as the next digit of the answer. 
Result so far: 5409.5858
If we subtract 792 from 850, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 11:
If we divide 580 by 99, we get 5 and a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 5409.58585
Subtracting 495 from 580 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 12:
850 divided by 99 is 8 with a remainder of 58.
The next digit of our result is 8. 
Result so far: 5409.585858
Deduct 792 from 850 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 13:
If we divide 580 by 99, we get 5 and a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 5409.5858585
If we take 495 away from 580, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Step 14:
When dividing 850 by 99, we get 8 with a remainder of 58.
Record the quotient 8 as the next digit in the result. 
Result so far: 5409.58585858
Subtract 792 from 850 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

After the division, we end up with 5409.58585858 and a remainder of 5.8e-08.