We're dividing 753306 by 78 
The aim is to understand the frequency of 78 in 753306.

Going ahead to step 1:
If we divide 7 by 78, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 78

Going ahead to step 2:
78 goes into 75 0 times with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Bring next digit (3) of the dividend behind the 75 and repeat the process: 753 / 78

Step 3:
When dividing 753 by 78, we get 9 with a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 702 from 753 and we're left with 51.
Take the next digit (3) from the dividend and append it to 51, then repeat: 513 / 78

Going ahead to step 4:
If we divide 513 by 78, we get 6 and a remainder of 45.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
Subtract 468 from 513 to get 45.
Bring next digit (0) of the dividend behind the 45 and repeat the process: 450 / 78

Advancing to step 5:
The number 78 fits into 450 5 times, leaving a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 965.0
Subtracting 390 from 450 leaves us with 60.
Append the next digit (6) from the dividend to 60 and continue with: 606 / 78

Moving on to step 6:
606 divided by 78 is 7 with a remainder of 60.
Record the quotient 7 as the next digit in the result. 
Result so far: 9657.0
The remainder is 60 after subtracting 546 from 606.
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 7:
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: 9657.7
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 8:
When dividing 540 by 78, we get 6 with a remainder of 72.
The next digit of our result is 6. 
Result so far: 9657.76
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 9:
720 divided by 78 is 9 with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 9657.769
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.

On to step 10:
The number 78 fits into 180 2 times, leaving a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 9657.7692
Subtract 156 from 180 to 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.

On to step 11:
78 goes into 240 3 times with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 9657.76923
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.

On to step 12:
When dividing 60 by 78, we get 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 9657.76923
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 13:
If we divide 600 by 78, we get 7 and a remainder of 54.
Write down 7 as next digit of the result. 
Result so far: 9657.7692307
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.

On to step 14:
78 can be fit into 540 6 times, resulting in a remainder of 72.
The next digit of our result is 6. 
Result so far: 9657.76923076
Subtracting 468 from 540 leaves us 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.

The final outcome is 9657.76923076, with a leftover of 7.2e-08.