We look at the division of 72903 by 79 
The aim is to understand the frequency of 79 in 72903.

Moving on to step 1:
The number 79 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 79

Moving on to step 2:
If we divide 72 by 79, we get 0 and a remainder of 72.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Take the next digit (9) from the dividend and append it to 72, then repeat: 729 / 79

Let's proceed to step 3:
79 can be fit into 729 9 times, resulting in a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 18 after subtracting 711 from 729.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 79

Moving on to step 4:
180 divided by 79 is 2 with a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 92.0
The remainder is 22 after subtracting 158 from 180.
Include the next digit (3) from the dividend after 22, then repeat: 223 / 79

Advancing to step 5:
79 can be fit into 223 2 times, resulting in a remainder of 65.
The next digit of our result is 2. 
Result so far: 922.0
If we subtract 158 from 223, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 6:
The number 79 fits into 650 8 times, leaving a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 922.8
Deduct 632 from 650 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
79 can be fit into 180 2 times, resulting in a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 922.82
Subtract 158 from 180 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 8:
220 divided by 79 is 2 with a remainder of 62.
The number 2 becomes the next digit in our result. 
Result so far: 922.822
If we take 158 away from 220, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The final result is 922.822 with a remainder of 0.0062.