521136 divided by 78 
The aim is to understand the frequency of 78 in 521136.

On to step 1:
78 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 78

Advancing to step 2:
When dividing 52 by 78, we get 0 with a remainder of 52.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 52, we end up with 52.
Include the next digit (1) from the dividend after 52, then repeat: 521 / 78

Let's proceed to step 3:
If we divide 521 by 78, we get 6 and a remainder of 53.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 468 from 521 to get 53.
Grab the next digit (1) from the dividend, add it to 53, then carry on: 531 / 78

Advancing to step 4:
531 divided by 78 is 6 with a remainder of 63.
The next digit of our result is 6. 
Result so far: 66.0
If we subtract 468 from 531, we get 63.
Bring next digit (3) of the dividend behind the 63 and repeat the process: 633 / 78

Moving on to step 5:
633 divided by 78 is 8 with a remainder of 9.
Use 8 as the next digit of our solution. 
Result so far: 668.0
Deduct 624 from 633 and we're left with 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 78

Step 6:
78 goes into 96 1 times with a remainder of 18.
The next digit of our result is 1. 
Result so far: 6681.0
If we take 78 away from 96, we end up 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 7:
78 goes into 180 2 times with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 6681.2
Subtracting 156 from 180 leaves us 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.

Going ahead to step 8:
240 divided by 78 is 3 with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 6681.23
Deduct 234 from 240 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 9:
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: 6681.23
Deduct 0 from 60 and we're left 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 10:
When dividing 600 by 78, we get 7 with a remainder of 54.
Record the quotient 7 as the next digit in the result. 
Result so far: 6681.2307
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.

Let's proceed to step 11:
The number 78 fits into 540 6 times, leaving a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 6681.23076
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 12:
The number 78 fits into 720 9 times, leaving a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 6681.230769
If we take 702 away from 720, we end up 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.

Going ahead to step 13:
If we divide 180 by 78, we get 2 and a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 6681.2307692
If we subtract 156 from 180, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
The number 78 fits into 240 3 times, leaving a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 6681.23076923
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.

Our division results in 6681.23076923 with a remaining 6e-09.