Let's divide 388680 by 78
The aim is to understand the frequency of 78 in 388680.

On to step 1:
3 divided by 78 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 78

Let's proceed to step 2:
78 can be fit into 38 0 times, resulting in a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 38, we get 38.
Bring next digit (8) of the dividend behind the 38 and repeat the process: 388 / 78

On to step 3:
The number 78 fits into 388 4 times, leaving a remainder of 76.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 312 away from 388, we end up with 76.
Include the next digit (6) from the dividend after 76, then repeat: 766 / 78

Advancing to step 4:
The number 78 fits into 766 9 times, leaving a remainder of 64.
Use 9 as the next digit of our solution. 
Result so far: 49.0
The remainder is 64 after subtracting 702 from 766.
Include the next digit (8) from the dividend after 64, then repeat: 648 / 78

On to step 5:
The number 78 fits into 648 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 498.0
Subtracting 624 from 648 leaves us with 24.
Include the next digit (0) from the dividend after 24, then repeat: 240 / 78

Going ahead to step 6:
If we divide 240 by 78, we get 3 and a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 4983.0
The remainder is 6 after subtracting 234 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
78 goes into 60 0 times with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 4983.0
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
The number 78 fits into 600 7 times, leaving a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 4983.07
Deduct 546 from 600 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 9:
78 can be fit into 540 6 times, resulting in a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 4983.076
If we take 468 away from 540, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 10:
When dividing 720 by 78, we get 9 with a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 4983.0769
The remainder is 18 after subtracting 702 from 720.
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 11:
The number 78 fits into 180 2 times, leaving a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 4983.07692
If we take 156 away from 180, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
When dividing 240 by 78, we get 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 4983.076923
If we subtract 234 from 240, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 13:
78 goes into 60 0 times with a remainder of 60.
The next digit of our result is 0. 
Result so far: 4983.076923
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 14:
If we divide 600 by 78, we get 7 and a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 4983.07692307
The remainder is 54 after subtracting 546 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 4983.07692307, with a leftover of 5.4e-08.