Let's divide 16020356 by 999
The aim is to understand the frequency of 999 in 16020356.

Step 1:
If we divide 1 by 999, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 999

Going ahead to step 2:
The number 999 fits into 16 0 times, leaving a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 999

Let's proceed to step 3:
The number 999 fits into 160 0 times, leaving a remainder of 160.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 160, we end up with 160.
Include the next digit (2) from the dividend after 160, then repeat: 1602 / 999

Moving on to step 4:
999 goes into 1602 1 times with a remainder of 603.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 603 after subtracting 999 from 1602.
Include the next digit (0) from the dividend after 603, then repeat: 6030 / 999

Step 5:
If we divide 6030 by 999, we get 6 and a remainder of 36.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 5994 from 6030 and we're left with 36.
Bring next digit (3) of the dividend behind the 36 and repeat the process: 363 / 999

Going ahead to step 6:
363 divided by 999 is 0 with a remainder of 363.
Put 0 as the next digit of the answer. 
Result so far: 160.0
Subtract 0 from 363 to get 363.
Grab the next digit (5) from the dividend, add it to 363, then carry on: 3635 / 999

On to step 7:
999 goes into 3635 3 times with a remainder of 638.
Put 3 as the next digit of the answer. 
Result so far: 1603.0
If we take 2997 away from 3635, we end up with 638.
Append the next digit (6) from the dividend to 638 and continue with: 6386 / 999

On to step 8:
The number 999 fits into 6386 6 times, leaving a remainder of 392.
The next digit of our result is 6. 
Result so far: 16036.0
Subtracting 5994 from 6386 leaves us with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Moving on to step 9:
999 can be fit into 3920 3 times, resulting in a remainder of 923.
Use 3 as the next digit of our solution. 
Result so far: 16036.3
The remainder is 923 after subtracting 2997 from 3920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9230, and continue the process.

On to step 10:
If we divide 9230 by 999, we get 9 and a remainder of 239.
Put 9 as the next digit of the answer. 
Result so far: 16036.39
Subtract 8991 from 9230 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Moving on to step 11:
999 can be fit into 2390 2 times, resulting in a remainder of 392.
Write down 2 as next digit of the result. 
Result so far: 16036.392
The remainder is 392 after subtracting 1998 from 2390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Step 12:
3920 divided by 999 is 3 with a remainder of 923.
The number 3 becomes the next digit in our result. 
Result so far: 16036.3923
The remainder is 923 after subtracting 2997 from 3920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9230, and continue the process.

Moving on to step 13:
999 can be fit into 9230 9 times, resulting in a remainder of 239.
The number 9 becomes the next digit in our result. 
Result so far: 16036.39239
Subtract 8991 from 9230 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Moving on to step 14:
999 goes into 2390 2 times with a remainder of 392.
Use 2 as the next digit of our solution. 
Result so far: 16036.392392
If we subtract 1998 from 2390, we get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

On to step 15:
999 can be fit into 3920 3 times, resulting in a remainder of 923.
The next digit of our result is 3. 
Result so far: 16036.3923923
If we subtract 2997 from 3920, we get 923.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9230, and continue the process.

Advancing to step 16:
The number 999 fits into 9230 9 times, leaving a remainder of 239.
Put 9 as the next digit of the answer. 
Result so far: 16036.39239239
Subtract 8991 from 9230 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

After the division, we end up with 16036.39239239 and a remainder of 2.39e-07.