We look at the division of 20678076 by 678 
The aim is to understand the frequency of 678 in 20678076.

Advancing to step 1:
If we divide 2 by 678, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 678

Advancing to step 2:
678 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 678

Going ahead to step 3:
If we divide 206 by 678, we get 0 and a remainder of 206.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 206, we end up with 206.
Include the next digit (7) from the dividend after 206, then repeat: 2067 / 678

Let's proceed to step 4:
The number 678 fits into 2067 3 times, leaving a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 2034 from 2067, we get 33.
Include the next digit (8) from the dividend after 33, then repeat: 338 / 678

Going ahead to step 5:
If we divide 338 by 678, we get 0 and a remainder of 338.
Use 0 as the next digit of our solution. 
Result so far: 30.0
Subtract 0 from 338 to get 338.
Bring next digit (0) of the dividend behind the 338 and repeat the process: 3380 / 678

On to step 6:
The number 678 fits into 3380 4 times, leaving a remainder of 668.
The next digit of our result is 4. 
Result so far: 304.0
Subtract 2712 from 3380 to get 668.
Bring next digit (7) of the dividend behind the 668 and repeat the process: 6687 / 678

Advancing to step 7:
When dividing 6687 by 678, we get 9 with a remainder of 585.
Write down 9 as next digit of the result. 
Result so far: 3049.0
Subtract 6102 from 6687 to get 585.
Take the next digit (6) from the dividend and append it to 585, then repeat: 5856 / 678

Advancing to step 8:
678 can be fit into 5856 8 times, resulting in a remainder of 432.
Write down 8 as next digit of the result. 
Result so far: 30498.0
The remainder is 432 after subtracting 5424 from 5856.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

On to step 9:
The number 678 fits into 4320 6 times, leaving a remainder of 252.
Put 6 as the next digit of the answer. 
Result so far: 30498.6
If we subtract 4068 from 4320, we get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 10:
If we divide 2520 by 678, we get 3 and a remainder of 486.
The next digit of our result is 3. 
Result so far: 30498.63
Deduct 2034 from 2520 and we're left with 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Step 11:
4860 divided by 678 is 7 with a remainder of 114.
Write down 7 as next digit of the result. 
Result so far: 30498.637
If we take 4746 away from 4860, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Going ahead to step 12:
678 goes into 1140 1 times with a remainder of 462.
Record the quotient 1 as the next digit in the result. 
Result so far: 30498.6371
If we take 678 away from 1140, we end up with 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Going ahead to step 13:
4620 divided by 678 is 6 with a remainder of 552.
Use 6 as the next digit of our solution. 
Result so far: 30498.63716
If we take 4068 away from 4620, we end up with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Step 14:
678 can be fit into 5520 8 times, resulting in a remainder of 96.
Use 8 as the next digit of our solution. 
Result so far: 30498.637168
Subtract 5424 from 5520 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 15:
When dividing 960 by 678, we get 1 with a remainder of 282.
Write down 1 as next digit of the result. 
Result so far: 30498.6371681
If we subtract 678 from 960, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Moving on to step 16:
The number 678 fits into 2820 4 times, leaving a remainder of 108.
Use 4 as the next digit of our solution. 
Result so far: 30498.63716814
Deduct 2712 from 2820 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

After the division, we end up with 30498.63716814 and a remainder of 1.08e-07.