68139498 ÷ 999 
The aim is to understand the frequency of 999 in 68139498.

Step 1:
The number 999 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 999

Let's proceed to step 2:
68 divided by 999 is 0 with a remainder of 68.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 68, we end up with 68.
Bring next digit (1) of the dividend behind the 68 and repeat the process: 681 / 999

Advancing to step 3:
When dividing 681 by 999, we get 0 with a remainder of 681.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 681 leaves us with 681.
Include the next digit (3) from the dividend after 681, then repeat: 6813 / 999

Advancing to step 4:
The number 999 fits into 6813 6 times, leaving a remainder of 819.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 5994 from 6813, we get 819.
Include the next digit (9) from the dividend after 819, then repeat: 8199 / 999

On to step 5:
The number 999 fits into 8199 8 times, leaving a remainder of 207.
Use 8 as the next digit of our solution. 
Result so far: 68.0
If we subtract 7992 from 8199, we get 207.
Fetch the next digit (4) from the dividend, attach it to 207 and continue: 2074 / 999

Moving on to step 6:
If we divide 2074 by 999, we get 2 and a remainder of 76.
Put 2 as the next digit of the answer. 
Result so far: 682.0
Subtracting 1998 from 2074 leaves us with 76.
Fetch the next digit (9) from the dividend, attach it to 76 and continue: 769 / 999

Advancing to step 7:
If we divide 769 by 999, we get 0 and a remainder of 769.
Put 0 as the next digit of the answer. 
Result so far: 6820.0
Subtract 0 from 769 to get 769.
Take the next digit (8) from the dividend and append it to 769, then repeat: 7698 / 999

Let's proceed to step 8:
7698 divided by 999 is 7 with a remainder of 705.
Use 7 as the next digit of our solution. 
Result so far: 68207.0
Deduct 6993 from 7698 and we're left with 705.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7050, and continue the process.

On to step 9:
When dividing 7050 by 999, we get 7 with a remainder of 57.
The number 7 becomes the next digit in our result. 
Result so far: 68207.7
Subtract 6993 from 7050 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 10:
999 goes into 570 0 times with a remainder of 570.
Put 0 as the next digit of the answer. 
Result so far: 68207.7
Subtract 0 from 570 to get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Let's proceed to step 11:
999 goes into 5700 5 times with a remainder of 705.
The next digit of our result is 5. 
Result so far: 68207.705
If we subtract 4995 from 5700, we get 705.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7050, and continue the process.

Moving on to step 12:
999 goes into 7050 7 times with a remainder of 57.
Use 7 as the next digit of our solution. 
Result so far: 68207.7057
The remainder is 57 after subtracting 6993 from 7050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 13:
The number 999 fits into 570 0 times, leaving a remainder of 570.
Use 0 as the next digit of our solution. 
Result so far: 68207.7057
If we subtract 0 from 570, we get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Advancing to step 14:
When dividing 5700 by 999, we get 5 with a remainder of 705.
The number 5 becomes the next digit in our result. 
Result so far: 68207.705705
Subtracting 4995 from 5700 leaves us with 705.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7050, and continue the process.

Advancing to step 15:
999 can be fit into 7050 7 times, resulting in a remainder of 57.
The next digit of our result is 7. 
Result so far: 68207.7057057
Subtract 6993 from 7050 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 16:
999 goes into 570 0 times with a remainder of 570.
The number 0 becomes the next digit in our result. 
Result so far: 68207.7057057
Subtract 0 from 570 to get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

In conclusion, the division gives 68207.7057057 with a balance of 5.7e-07.