99400812 ÷ 499 
The aim is to understand the frequency of 499 in 99400812.

Advancing to step 1:
When dividing 9 by 499, we get 0 with 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.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 499

Step 2:
99 divided by 499 is 0 with a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 99 and we're left with 99.
Fetch the next digit (4) from the dividend, attach it to 99 and continue: 994 / 499

Step 3:
When dividing 994 by 499, we get 1 with a remainder of 495.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 499 from 994 and we're left with 495.
Take the next digit (0) from the dividend and append it to 495, then repeat: 4950 / 499

On to step 4:
499 can be fit into 4950 9 times, resulting in a remainder of 459.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
If we subtract 4491 from 4950, we get 459.
Bring next digit (0) of the dividend behind the 459 and repeat the process: 4590 / 499

On to step 5:
499 can be fit into 4590 9 times, resulting in a remainder of 99.
Write down 9 as next digit of the result. 
Result so far: 199.0
Subtract 4491 from 4590 to get 99.
Append the next digit (8) from the dividend to 99 and continue with: 998 / 499

Moving on to step 6:
If we divide 998 by 499, we get 2 and a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 1992.0
If we subtract 998 from 998, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 499

On to step 7:
If we divide 1 by 499, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 19920.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 499

On to step 8:
499 goes into 12 0 times with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 199200.0
Subtracting 0 from 12 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 9:
When dividing 120 by 499, we get 0 with a remainder of 120.
Put 0 as the next digit of the answer. 
Result so far: 199200.0
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 10:
1200 divided by 499 is 2 with a remainder of 202.
Use 2 as the next digit of our solution. 
Result so far: 199200.02
Subtract 998 from 1200 to get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

On to step 11:
499 goes into 2020 4 times with a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 199200.024
If we subtract 1996 from 2020, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
If we divide 240 by 499, we get 0 and a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 199200.024
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 13:
If we divide 2400 by 499, we get 4 and a remainder of 404.
The next digit of our result is 4. 
Result so far: 199200.02404
Subtracting 1996 from 2400 leaves us with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Going ahead to step 14:
The number 499 fits into 4040 8 times, leaving a remainder of 48.
The next digit of our result is 8. 
Result so far: 199200.024048
Subtract 3992 from 4040 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.

Step 15:
The number 499 fits into 480 0 times, leaving a remainder of 480.
Put 0 as the next digit of the answer. 
Result so far: 199200.024048
If we subtract 0 from 480, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 16:
499 goes into 4800 9 times with a remainder of 309.
Write down 9 as next digit of the result. 
Result so far: 199200.02404809
If we take 4491 away from 4800, we end up with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

After the division, we end up with 199200.02404809 and a remainder of 3.09e-07.