We look at the division of 789430 by 79 
The aim is to understand the frequency of 79 in 789430.

Step 1:
If we divide 7 by 79, we get 0 and 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.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 79

Let's proceed to step 2:
If we divide 78 by 79, we get 0 and a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Fetch the next digit (9) from the dividend, attach it to 78 and continue: 789 / 79

Step 3:
The number 79 fits into 789 9 times, leaving a remainder of 78.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 711 away from 789, we end up with 78.
Append the next digit (4) from the dividend to 78 and continue with: 784 / 79

On to step 4:
79 can be fit into 784 9 times, resulting in a remainder of 73.
Put 9 as the next digit of the answer. 
Result so far: 99.0
If we subtract 711 from 784, we get 73.
Fetch the next digit (3) from the dividend, attach it to 73 and continue: 733 / 79

On to step 5:
The number 79 fits into 733 9 times, leaving a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 999.0
If we take 711 away from 733, we end up with 22.
Include the next digit (0) from the dividend after 22, then repeat: 220 / 79

Moving on to step 6:
The number 79 fits into 220 2 times, leaving a remainder of 62.
Record the quotient 2 as the next digit in the result. 
Result so far: 9992.0
The remainder is 62 after subtracting 158 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 7:
79 goes into 620 7 times with a remainder of 67.
Put 7 as the next digit of the answer. 
Result so far: 9992.7
If we take 553 away from 620, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 8:
79 can be fit into 670 8 times, resulting in a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 9992.78
If we take 632 away from 670, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 9:
If we divide 380 by 79, we get 4 and a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 9992.784
Deduct 316 from 380 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 10:
79 can be fit into 640 8 times, resulting in a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 9992.7848
The remainder is 8 after subtracting 632 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
If we divide 80 by 79, we get 1 and a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 9992.78481
Deduct 79 from 80 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 12:
10 divided by 79 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 9992.78481
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 13:
If we divide 100 by 79, we get 1 and a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 9992.7848101
Subtracting 79 from 100 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 14:
The number 79 fits into 210 2 times, leaving a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 9992.78481012
If we subtract 158 from 210, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 9992.78481012 and a remainder of 5.2e-08.