We look at the division of 573651 by 99 
The aim is to understand the frequency of 99 in 573651.

Let's proceed to step 1:
When dividing 5 by 99, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 99

Moving on to step 2:
99 goes into 57 0 times with a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Include the next digit (3) from the dividend after 57, then repeat: 573 / 99

Step 3:
If we divide 573 by 99, we get 5 and a remainder of 78.
The next digit of our result is 5. 
Result so far: 5.0
If we take 495 away from 573, we end up with 78.
Take the next digit (6) from the dividend and append it to 78, then repeat: 786 / 99

Going ahead to step 4:
When dividing 786 by 99, we get 7 with a remainder of 93.
The next digit of our result is 7. 
Result so far: 57.0
Subtracting 693 from 786 leaves us with 93.
Fetch the next digit (5) from the dividend, attach it to 93 and continue: 935 / 99

Advancing to step 5:
The number 99 fits into 935 9 times, leaving a remainder of 44.
The number 9 becomes the next digit in our result. 
Result so far: 579.0
The remainder is 44 after subtracting 891 from 935.
Grab the next digit (1) from the dividend, add it to 44, then carry on: 441 / 99

Moving on to step 6:
99 goes into 441 4 times with a remainder of 45.
Write down 4 as next digit of the result. 
Result so far: 5794.0
If we subtract 396 from 441, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 7:
99 can be fit into 450 4 times, resulting in a remainder of 54.
The number 4 becomes the next digit in our result. 
Result so far: 5794.4
Subtract 396 from 450 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 8:
If we divide 540 by 99, we get 5 and a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 5794.45
The remainder is 45 after subtracting 495 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 9:
450 divided by 99 is 4 with a remainder of 54.
Record the quotient 4 as the next digit in the result. 
Result so far: 5794.454
Subtracting 396 from 450 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 10:
540 divided by 99 is 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 5794.4545
If we subtract 495 from 540, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 11:
99 can be fit into 450 4 times, resulting in a remainder of 54.
Write down 4 as next digit of the result. 
Result so far: 5794.45454
Deduct 396 from 450 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 12:
The number 99 fits into 540 5 times, leaving a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 5794.454545
Subtracting 495 from 540 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 13:
450 divided by 99 is 4 with a remainder of 54.
The next digit of our result is 4. 
Result so far: 5794.4545454
The remainder is 54 after subtracting 396 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 14:
99 can be fit into 540 5 times, resulting in a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 5794.45454545
Deduct 495 from 540 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final result is 5794.45454545 with a remainder of 4.5e-08.