We look at the division of 679312 by 78 
The aim is to understand the frequency of 78 in 679312.

On to step 1:
When dividing 6 by 78, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 78

On to step 2:
78 goes into 67 0 times with a remainder of 67.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 67, we get 67.
Grab the next digit (9) from the dividend, add it to 67, then carry on: 679 / 78

On to step 3:
679 divided by 78 is 8 with a remainder of 55.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 55 after subtracting 624 from 679.
Grab the next digit (3) from the dividend, add it to 55, then carry on: 553 / 78

Step 4:
The number 78 fits into 553 7 times, leaving a remainder of 7.
The next digit of our result is 7. 
Result so far: 87.0
If we take 546 away from 553, we end up with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 78

Step 5:
78 can be fit into 71 0 times, resulting in a remainder of 71.
Write down 0 as next digit of the result. 
Result so far: 870.0
Subtracting 0 from 71 leaves us with 71.
Take the next digit (2) from the dividend and append it to 71, then repeat: 712 / 78

Moving on to step 6:
78 can be fit into 712 9 times, resulting in a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 8709.0
The remainder is 10 after subtracting 702 from 712.
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 7:
78 can be fit into 100 1 times, resulting in a remainder of 22.
Use 1 as the next digit of our solution. 
Result so far: 8709.1
If we take 78 away from 100, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 8:
The number 78 fits into 220 2 times, leaving a remainder of 64.
Record the quotient 2 as the next digit in the result. 
Result so far: 8709.12
Subtract 156 from 220 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 9:
78 goes into 640 8 times with a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 8709.128
Subtract 624 from 640 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 10:
78 can be fit into 160 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 8709.1282
Subtract 156 from 160 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
40 divided by 78 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 8709.1282
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 12:
The number 78 fits into 400 5 times, leaving a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 8709.128205
Subtracting 390 from 400 leaves us 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:
When dividing 100 by 78, we get 1 with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 8709.1282051
The remainder is 22 after subtracting 78 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 14:
If we divide 220 by 78, we get 2 and a remainder of 64.
Put 2 as the next digit of the answer. 
Result so far: 8709.12820512
Subtract 156 from 220 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final result is 8709.12820512 with a remainder of 6.4e-08.