We look at the division of 72141487 by 998 
The aim is to understand the frequency of 998 in 72141487.

Going ahead to step 1:
The number 998 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 998

Step 2:
When dividing 72 by 998, we get 0 with a remainder of 72.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Fetch the next digit (1) from the dividend, attach it to 72 and continue: 721 / 998

Going ahead to step 3:
998 can be fit into 721 0 times, resulting in a remainder of 721.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 721 and we're left with 721.
Append the next digit (4) from the dividend to 721 and continue with: 7214 / 998

Step 4:
If we divide 7214 by 998, we get 7 and a remainder of 228.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 228 after subtracting 6986 from 7214.
Grab the next digit (1) from the dividend, add it to 228, then carry on: 2281 / 998

Going ahead to step 5:
2281 divided by 998 is 2 with a remainder of 285.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
If we subtract 1996 from 2281, we get 285.
Take the next digit (4) from the dividend and append it to 285, then repeat: 2854 / 998

Going ahead to step 6:
When dividing 2854 by 998, we get 2 with a remainder of 858.
Write down 2 as next digit of the result. 
Result so far: 722.0
If we take 1996 away from 2854, we end up with 858.
Take the next digit (8) from the dividend and append it to 858, then repeat: 8588 / 998

On to step 7:
998 goes into 8588 8 times with a remainder of 604.
The next digit of our result is 8. 
Result so far: 7228.0
Deduct 7984 from 8588 and we're left with 604.
Bring next digit (7) of the dividend behind the 604 and repeat the process: 6047 / 998

Let's proceed to step 8:
6047 divided by 998 is 6 with a remainder of 59.
Use 6 as the next digit of our solution. 
Result so far: 72286.0
Deduct 5988 from 6047 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 9:
When dividing 590 by 998, we get 0 with a remainder of 590.
The next digit of our result is 0. 
Result so far: 72286.0
The remainder is 590 after subtracting 0 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Moving on to step 10:
The number 998 fits into 5900 5 times, leaving a remainder of 910.
Put 5 as the next digit of the answer. 
Result so far: 72286.05
Subtract 4990 from 5900 to get 910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9100, and continue the process.

Advancing to step 11:
If we divide 9100 by 998, we get 9 and a remainder of 118.
The next digit of our result is 9. 
Result so far: 72286.059
Subtracting 8982 from 9100 leaves us with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Let's proceed to step 12:
If we divide 1180 by 998, we get 1 and a remainder of 182.
The number 1 becomes the next digit in our result. 
Result so far: 72286.0591
Subtract 998 from 1180 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Let's proceed to step 13:
The number 998 fits into 1820 1 times, leaving a remainder of 822.
Put 1 as the next digit of the answer. 
Result so far: 72286.05911
If we subtract 998 from 1820, we get 822.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8220, and continue the process.

The quotient of the division is 72286.05911, and the remainder is 0.000822.