We look at the division of 249615 by 78 
The aim is to understand the frequency of 78 in 249615.

Advancing to step 1:
The number 78 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 78

On to step 2:
When dividing 24 by 78, we get 0 with a remainder of 24.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 24, we get 24.
Take the next digit (9) from the dividend and append it to 24, then repeat: 249 / 78

Going ahead to step 3:
If we divide 249 by 78, we get 3 and a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 234 from 249 and we're left with 15.
Bring next digit (6) of the dividend behind the 15 and repeat the process: 156 / 78

Moving on to step 4:
The number 78 fits into 156 2 times, leaving a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 32.0
Subtract 156 from 156 to get 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 78

Let's proceed to step 5:
1 divided by 78 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 320.0
If we subtract 0 from 1, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 78

Moving on to step 6:
When dividing 15 by 78, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 3200.0
If we take 0 away from 15, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
78 can be fit into 150 1 times, resulting in a remainder of 72.
The next digit of our result is 1. 
Result so far: 3200.1
The remainder is 72 after subtracting 78 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 8:
78 goes into 720 9 times with a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 3200.19
Deduct 702 from 720 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 9:
The number 78 fits into 180 2 times, leaving a remainder of 24.
The next digit of our result is 2. 
Result so far: 3200.192
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
The number 78 fits into 240 3 times, leaving a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 3200.1923
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.

Moving on to step 11:
If we divide 60 by 78, we get 0 and a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 3200.1923
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.

Going ahead to step 12:
600 divided by 78 is 7 with a remainder of 54.
The next digit of our result is 7. 
Result so far: 3200.192307
Subtract 546 from 600 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 13:
78 goes into 540 6 times with a remainder of 72.
The next digit of our result is 6. 
Result so far: 3200.1923076
If we subtract 468 from 540, we get 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 14:
78 goes into 720 9 times with a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 3200.19230769
Deduct 702 from 720 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

In conclusion, the division gives 3200.19230769 with a balance of 1.8e-08.