68391607 divided by 998 
The aim is to understand the frequency of 998 in 68391607.

Step 1:
The number 998 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 998

Let's proceed to step 2:
998 goes into 68 0 times with a remainder of 68.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 68, we get 68.
Take the next digit (3) from the dividend and append it to 68, then repeat: 683 / 998

On to step 3:
998 goes into 683 0 times with a remainder of 683.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 683 to get 683.
Take the next digit (9) from the dividend and append it to 683, then repeat: 6839 / 998

Moving on to step 4:
The number 998 fits into 6839 6 times, leaving a remainder of 851.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 851 after subtracting 5988 from 6839.
Take the next digit (1) from the dividend and append it to 851, then repeat: 8511 / 998

Let's proceed to step 5:
998 can be fit into 8511 8 times, resulting in a remainder of 527.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
The remainder is 527 after subtracting 7984 from 8511.
Include the next digit (6) from the dividend after 527, then repeat: 5276 / 998

Step 6:
5276 divided by 998 is 5 with a remainder of 286.
The next digit of our result is 5. 
Result so far: 685.0
Deduct 4990 from 5276 and we're left with 286.
Fetch the next digit (0) from the dividend, attach it to 286 and continue: 2860 / 998

Advancing to step 7:
998 can be fit into 2860 2 times, resulting in a remainder of 864.
The next digit of our result is 2. 
Result so far: 6852.0
Subtract 1996 from 2860 to get 864.
Append the next digit (7) from the dividend to 864 and continue with: 8647 / 998

Advancing to step 8:
When dividing 8647 by 998, we get 8 with a remainder of 663.
Record the quotient 8 as the next digit in the result. 
Result so far: 68528.0
Subtract 7984 from 8647 to get 663.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6630, and continue the process.

Let's proceed to step 9:
998 can be fit into 6630 6 times, resulting in a remainder of 642.
Use 6 as the next digit of our solution. 
Result so far: 68528.6
If we take 5988 away from 6630, we end up with 642.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6420, and continue the process.

Going ahead to step 10:
The number 998 fits into 6420 6 times, leaving a remainder of 432.
Put 6 as the next digit of the answer. 
Result so far: 68528.66
Subtract 5988 from 6420 to get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

The final outcome is 68528.66, with a leftover of 0.432.