We're dividing 721479 by 78 
The aim is to understand the frequency of 78 in 721479.

Going ahead to step 1:
7 divided by 78 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 78

On to step 2:
78 can be fit into 72 0 times, resulting in a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Take the next digit (1) from the dividend and append it to 72, then repeat: 721 / 78

Moving on to step 3:
The number 78 fits into 721 9 times, leaving a remainder of 19.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 702 from 721, we get 19.
Take the next digit (4) from the dividend and append it to 19, then repeat: 194 / 78

On to step 4:
If we divide 194 by 78, we get 2 and a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 92.0
Subtract 156 from 194 to get 38.
Bring next digit (7) of the dividend behind the 38 and repeat the process: 387 / 78

On to step 5:
78 goes into 387 4 times with a remainder of 75.
Use 4 as the next digit of our solution. 
Result so far: 924.0
If we take 312 away from 387, we end up with 75.
Bring next digit (9) of the dividend behind the 75 and repeat the process: 759 / 78

Moving on to step 6:
78 can be fit into 759 9 times, resulting in a remainder of 57.
Write down 9 as next digit of the result. 
Result so far: 9249.0
If we take 702 away from 759, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 7:
78 can be fit into 570 7 times, resulting in a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 9249.7
If we subtract 546 from 570, 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.

Advancing to step 8:
78 goes into 240 3 times with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 9249.73
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.

Let's proceed to step 9:
If we divide 60 by 78, we get 0 and a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 9249.73
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.

Step 10:
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: 9249.7307
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.

Step 11:
540 divided by 78 is 6 with a remainder of 72.
Put 6 as the next digit of the answer. 
Result so far: 9249.73076
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.

Step 12:
720 divided by 78 is 9 with a remainder of 18.
The next digit of our result is 9. 
Result so far: 9249.730769
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.

Going ahead to step 13:
If we divide 180 by 78, we get 2 and a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 9249.7307692
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.

Advancing to step 14:
78 can be fit into 240 3 times, resulting in a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 9249.73076923
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.

The final result is 9249.73076923 with a remainder of 6e-09.