987628 ÷ 78 
The aim is to understand the frequency of 78 in 987628.

Step 1:
78 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 78

Going ahead to step 2:
98 divided by 78 is 1 with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 78 from 98 and we're left with 20.
Append the next digit (7) from the dividend to 20 and continue with: 207 / 78

Moving on to step 3:
207 divided by 78 is 2 with a remainder of 51.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 156 from 207, we get 51.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 78

Moving on to step 4:
78 goes into 516 6 times with a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
The remainder is 48 after subtracting 468 from 516.
Grab the next digit (2) from the dividend, add it to 48, then carry on: 482 / 78

Going ahead to step 5:
The number 78 fits into 482 6 times, leaving a remainder of 14.
The next digit of our result is 6. 
Result so far: 1266.0
If we subtract 468 from 482, we get 14.
Take the next digit (8) from the dividend and append it to 14, then repeat: 148 / 78

Advancing to step 6:
78 goes into 148 1 times with a remainder of 70.
Record the quotient 1 as the next digit in the result. 
Result so far: 12661.0
The remainder is 70 after subtracting 78 from 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 7:
78 goes into 700 8 times with a remainder of 76.
The next digit of our result is 8. 
Result so far: 12661.8
Subtract 624 from 700 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 8:
When dividing 760 by 78, we get 9 with a remainder of 58.
Use 9 as the next digit of our solution. 
Result so far: 12661.89
If we take 702 away from 760, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 9:
580 divided by 78 is 7 with a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 12661.897
Deduct 546 from 580 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
The number 78 fits into 340 4 times, leaving a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 12661.8974
The remainder is 28 after subtracting 312 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 11:
78 can be fit into 280 3 times, resulting in a remainder of 46.
The number 3 becomes the next digit in our result. 
Result so far: 12661.89743
If we subtract 234 from 280, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 12:
When dividing 460 by 78, we get 5 with a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 12661.897435
The remainder is 70 after subtracting 390 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 13:
78 can be fit into 700 8 times, resulting in a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 12661.8974358
The remainder is 76 after subtracting 624 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

On to step 14:
78 can be fit into 760 9 times, resulting in a remainder of 58.
The next digit of our result is 9. 
Result so far: 12661.89743589
The remainder is 58 after subtracting 702 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

In conclusion, the division gives 12661.89743589 with a balance of 5.8e-08.