639882 ÷ 79 
The aim is to understand the frequency of 79 in 639882.

Let's proceed to step 1:
The number 79 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 79

Let's proceed to step 2:
63 divided by 79 is 0 with a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Include the next digit (9) from the dividend after 63, then repeat: 639 / 79

Step 3:
If we divide 639 by 79, we get 8 and a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 7 after subtracting 632 from 639.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 79

Let's proceed to step 4:
The number 79 fits into 78 0 times, leaving a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 80.0
Subtract 0 from 78 to get 78.
Include the next digit (8) from the dividend after 78, then repeat: 788 / 79

Going ahead to step 5:
When dividing 788 by 79, we get 9 with a remainder of 77.
Use 9 as the next digit of our solution. 
Result so far: 809.0
Deduct 711 from 788 and we're left with 77.
Include the next digit (2) from the dividend after 77, then repeat: 772 / 79

Advancing to step 6:
79 can be fit into 772 9 times, resulting in a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 8099.0
Subtracting 711 from 772 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 7:
When dividing 610 by 79, we get 7 with a remainder of 57.
The next digit of our result is 7. 
Result so far: 8099.7
If we take 553 away from 610, we end up with 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 8:
The number 79 fits into 570 7 times, leaving a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 8099.77
The remainder is 17 after subtracting 553 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

In conclusion, the division gives 8099.77 with a balance of 0.017.