We look at the division of 689840 by 79 
The aim is to understand the frequency of 79 in 689840.

Step 1:
The number 79 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 79

Let's proceed to step 2:
When dividing 68 by 79, we get 0 with a remainder of 68.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Include the next digit (9) from the dividend after 68, then repeat: 689 / 79

On to step 3:
The number 79 fits into 689 8 times, leaving a remainder of 57.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 632 from 689 leaves us with 57.
Grab the next digit (8) from the dividend, add it to 57, then carry on: 578 / 79

Going ahead to step 4:
79 can be fit into 578 7 times, resulting in a remainder of 25.
Use 7 as the next digit of our solution. 
Result so far: 87.0
If we subtract 553 from 578, we get 25.
Take the next digit (4) from the dividend and append it to 25, then repeat: 254 / 79

Let's proceed to step 5:
79 can be fit into 254 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 873.0
The remainder is 17 after subtracting 237 from 254.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 79

On to step 6:
170 divided by 79 is 2 with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 8732.0
The remainder is 12 after subtracting 158 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
120 divided by 79 is 1 with a remainder of 41.
Use 1 as the next digit of our solution. 
Result so far: 8732.1
If we take 79 away from 120, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 8:
410 divided by 79 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 8732.15
Subtract 395 from 410 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 9:
150 divided by 79 is 1 with a remainder of 71.
Use 1 as the next digit of our solution. 
Result so far: 8732.151
The remainder is 71 after subtracting 79 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 10:
79 can be fit into 710 8 times, resulting in a remainder of 78.
Write down 8 as next digit of the result. 
Result so far: 8732.1518
If we subtract 632 from 710, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 11:
If we divide 780 by 79, we get 9 and a remainder of 69.
Put 9 as the next digit of the answer. 
Result so far: 8732.15189
If we take 711 away from 780, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 12:
79 can be fit into 690 8 times, resulting in a remainder of 58.
The next digit of our result is 8. 
Result so far: 8732.151898
Subtract 632 from 690 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 13:
When dividing 580 by 79, we get 7 with a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 8732.1518987
The remainder is 27 after subtracting 553 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 14:
79 goes into 270 3 times with a remainder of 33.
Use 3 as the next digit of our solution. 
Result so far: 8732.15189873
Subtracting 237 from 270 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

In conclusion, the division gives 8732.15189873 with a balance of 3.3e-08.