555015 divided by 78 
The aim is to understand the frequency of 78 in 555015.

Advancing to step 1:
When dividing 5 by 78, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 78

Let's proceed to step 2:
The number 78 fits into 55 0 times, leaving a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 55 to get 55.
Fetch the next digit (5) from the dividend, attach it to 55 and continue: 555 / 78

Advancing to step 3:
When dividing 555 by 78, we get 7 with a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 546 from 555 to get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 78

Step 4:
If we divide 90 by 78, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Subtracting 78 from 90 leaves us with 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 78

Going ahead to step 5:
When dividing 121 by 78, we get 1 with a remainder of 43.
Put 1 as the next digit of the answer. 
Result so far: 711.0
Subtracting 78 from 121 leaves us with 43.
Fetch the next digit (5) from the dividend, attach it to 43 and continue: 435 / 78

Step 6:
78 goes into 435 5 times with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 7115.0
Subtracting 390 from 435 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 7:
78 can be fit into 450 5 times, resulting in a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 7115.5
Subtracting 390 from 450 leaves us 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.

Let's proceed to step 8:
When dividing 600 by 78, we get 7 with a remainder of 54.
The next digit of our result is 7. 
Result so far: 7115.57
Subtracting 546 from 600 leaves us 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.
Put 6 as the next digit of the answer. 
Result so far: 7115.576
The remainder is 72 after subtracting 468 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 10:
When dividing 720 by 78, we get 9 with a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 7115.5769
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.

On to step 11:
78 goes into 180 2 times with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 7115.57692
Deduct 156 from 180 and we're left 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.

Advancing to step 12:
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: 7115.576923
Subtract 234 from 240 to 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:
The number 78 fits into 60 0 times, leaving a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 7115.576923
Subtracting 0 from 60 leaves us 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.

On to step 14:
When dividing 600 by 78, we get 7 with a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 7115.57692307
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 7115.57692307, with a leftover of 5.4e-08.