We're dividing 486669 by 99 
The aim is to understand the frequency of 99 in 486669.

Moving on to step 1:
99 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 99

On to step 2:
If we divide 48 by 99, we get 0 and a remainder of 48.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 48 to get 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 99

Step 3:
When dividing 486 by 99, we get 4 with a remainder of 90.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 396 from 486 and we're left with 90.
Include the next digit (6) from the dividend after 90, then repeat: 906 / 99

On to step 4:
The number 99 fits into 906 9 times, leaving a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 49.0
If we subtract 891 from 906, we get 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 99

Moving on to step 5:
The number 99 fits into 156 1 times, leaving a remainder of 57.
The next digit of our result is 1. 
Result so far: 491.0
Subtract 99 from 156 to get 57.
Bring next digit (9) of the dividend behind the 57 and repeat the process: 579 / 99

Step 6:
When dividing 579 by 99, we get 5 with a remainder of 84.
Use 5 as the next digit of our solution. 
Result so far: 4915.0
The remainder is 84 after subtracting 495 from 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 7:
99 goes into 840 8 times with a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 4915.8
Subtracting 792 from 840 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 8:
The number 99 fits into 480 4 times, leaving a remainder of 84.
Use 4 as the next digit of our solution. 
Result so far: 4915.84
Subtracting 396 from 480 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 9:
If we divide 840 by 99, we get 8 and a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 4915.848
If we subtract 792 from 840, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 10:
If we divide 480 by 99, we get 4 and a remainder of 84.
The next digit of our result is 4. 
Result so far: 4915.8484
If we subtract 396 from 480, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 11:
The number 99 fits into 840 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 4915.84848
Subtract 792 from 840 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 12:
480 divided by 99 is 4 with a remainder of 84.
Put 4 as the next digit of the answer. 
Result so far: 4915.848484
Subtracting 396 from 480 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 13:
840 divided by 99 is 8 with a remainder of 48.
The next digit of our result is 8. 
Result so far: 4915.8484848
The remainder is 48 after subtracting 792 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 14:
If we divide 480 by 99, we get 4 and a remainder of 84.
Record the quotient 4 as the next digit in the result. 
Result so far: 4915.84848484
The remainder is 84 after subtracting 396 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

After the division, we end up with 4915.84848484 and a remainder of 8.4e-08.