We're dividing 668678 by 78 
The aim is to understand the frequency of 78 in 668678.

Let's proceed to step 1:
78 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 78

Advancing to step 2:
66 divided by 78 is 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Take the next digit (8) from the dividend and append it to 66, then repeat: 668 / 78

Advancing to step 3:
668 divided by 78 is 8 with a remainder of 44.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 624 from 668 leaves us with 44.
Bring next digit (6) of the dividend behind the 44 and repeat the process: 446 / 78

Advancing to step 4:
78 goes into 446 5 times with a remainder of 56.
Put 5 as the next digit of the answer. 
Result so far: 85.0
Subtract 390 from 446 to get 56.
Bring next digit (7) of the dividend behind the 56 and repeat the process: 567 / 78

Let's proceed to step 5:
78 goes into 567 7 times with a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 857.0
Subtract 546 from 567 to get 21.
Fetch the next digit (8) from the dividend, attach it to 21 and continue: 218 / 78

Moving on to step 6:
If we divide 218 by 78, we get 2 and a remainder of 62.
The number 2 becomes the next digit in our result. 
Result so far: 8572.0
Subtracting 156 from 218 leaves us 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.

Moving on to step 7:
78 goes into 620 7 times with a remainder of 74.
Use 7 as the next digit of our solution. 
Result so far: 8572.7
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.

Moving on to step 8:
740 divided by 78 is 9 with a remainder of 38.
Put 9 as the next digit of the answer. 
Result so far: 8572.79
Deduct 702 from 740 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 9:
The number 78 fits into 380 4 times, leaving a remainder of 68.
The number 4 becomes the next digit in our result. 
Result so far: 8572.794
Subtracting 312 from 380 leaves us 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.

Moving on to step 10:
If we divide 680 by 78, we get 8 and a remainder of 56.
Use 8 as the next digit of our solution. 
Result so far: 8572.7948
If we take 624 away from 680, we end up 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.

Advancing to step 11:
The number 78 fits into 560 7 times, leaving a remainder of 14.
The next digit of our result is 7. 
Result so far: 8572.79487
Subtracting 546 from 560 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 12:
140 divided by 78 is 1 with a remainder of 62.
Use 1 as the next digit of our solution. 
Result so far: 8572.794871
Deduct 78 from 140 and we're left 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.

Going ahead to step 13:
78 can be fit into 620 7 times, resulting in a remainder of 74.
The next digit of our result is 7. 
Result so far: 8572.7948717
The remainder is 74 after subtracting 546 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 14:
When dividing 740 by 78, we get 9 with a remainder of 38.
Use 9 as the next digit of our solution. 
Result so far: 8572.79487179
Deduct 702 from 740 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

In conclusion, the division gives 8572.79487179 with a balance of 3.8e-08.