We look at the division of 570404 by 78 
The aim is to understand the frequency of 78 in 570404.

Advancing to step 1:
If we divide 5 by 78, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 78

On to step 2:
If we divide 57 by 78, we get 0 and a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 57, we get 57.
Fetch the next digit (0) from the dividend, attach it to 57 and continue: 570 / 78

Going ahead to step 3:
When dividing 570 by 78, we get 7 with a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 546 from 570 leaves us with 24.
Fetch the next digit (4) from the dividend, attach it to 24 and continue: 244 / 78

Moving on to step 4:
When dividing 244 by 78, we get 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 73.0
Subtract 234 from 244 to get 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 78

Step 5:
100 divided by 78 is 1 with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 731.0
If we take 78 away from 100, we end up with 22.
Grab the next digit (4) from the dividend, add it to 22, then carry on: 224 / 78

Moving on to step 6:
78 can be fit into 224 2 times, resulting in a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 7312.0
Deduct 156 from 224 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 7:
78 can be fit into 680 8 times, resulting in a remainder of 56.
The number 8 becomes the next digit in our result. 
Result so far: 7312.8
Subtract 624 from 680 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 8:
78 goes into 560 7 times with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 7312.87
The remainder is 14 after subtracting 546 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
140 divided by 78 is 1 with a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 7312.871
If we take 78 away from 140, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 10:
If we divide 620 by 78, we get 7 and a remainder of 74.
Record the quotient 7 as the next digit in the result. 
Result so far: 7312.8717
Subtracting 546 from 620 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 11:
78 goes into 740 9 times with a remainder of 38.
Write down 9 as next digit of the result. 
Result so far: 7312.87179
If we subtract 702 from 740, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 12:
78 goes into 380 4 times with a remainder of 68.
Use 4 as the next digit of our solution. 
Result so far: 7312.871794
If we take 312 away from 380, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 13:
78 can be fit into 680 8 times, resulting in a remainder of 56.
Put 8 as the next digit of the answer. 
Result so far: 7312.8717948
Subtracting 624 from 680 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 14:
The number 78 fits into 560 7 times, leaving a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 7312.87179487
The remainder is 14 after subtracting 546 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The quotient of the division is 7312.87179487, and the remainder is 1.4e-08.