17423728 divided by 678 
The aim is to understand the frequency of 678 in 17423728.

Advancing to step 1:
When dividing 1 by 678, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 678

Moving on to step 2:
When dividing 17 by 678, we get 0 with a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Grab the next digit (4) from the dividend, add it to 17, then carry on: 174 / 678

Going ahead to step 3:
678 can be fit into 174 0 times, resulting in a remainder of 174.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 174, we end up with 174.
Include the next digit (2) from the dividend after 174, then repeat: 1742 / 678

Step 4:
If we divide 1742 by 678, we get 2 and a remainder of 386.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 1356 away from 1742, we end up with 386.
Take the next digit (3) from the dividend and append it to 386, then repeat: 3863 / 678

Let's proceed to step 5:
678 can be fit into 3863 5 times, resulting in a remainder of 473.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
The remainder is 473 after subtracting 3390 from 3863.
Fetch the next digit (7) from the dividend, attach it to 473 and continue: 4737 / 678

Step 6:
The number 678 fits into 4737 6 times, leaving a remainder of 669.
The number 6 becomes the next digit in our result. 
Result so far: 256.0
Subtracting 4068 from 4737 leaves us with 669.
Append the next digit (2) from the dividend to 669 and continue with: 6692 / 678

On to step 7:
If we divide 6692 by 678, we get 9 and a remainder of 590.
Put 9 as the next digit of the answer. 
Result so far: 2569.0
Deduct 6102 from 6692 and we're left with 590.
Fetch the next digit (8) from the dividend, attach it to 590 and continue: 5908 / 678

Moving on to step 8:
678 goes into 5908 8 times with a remainder of 484.
Use 8 as the next digit of our solution. 
Result so far: 25698.0
Deduct 5424 from 5908 and we're left with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Going ahead to step 9:
If we divide 4840 by 678, we get 7 and a remainder of 94.
Record the quotient 7 as the next digit in the result. 
Result so far: 25698.7
Subtracting 4746 from 4840 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 10:
940 divided by 678 is 1 with a remainder of 262.
Use 1 as the next digit of our solution. 
Result so far: 25698.71
Subtract 678 from 940 to get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Advancing to step 11:
If we divide 2620 by 678, we get 3 and a remainder of 586.
Write down 3 as next digit of the result. 
Result so far: 25698.713
If we take 2034 away from 2620, we end up with 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Step 12:
678 goes into 5860 8 times with a remainder of 436.
Write down 8 as next digit of the result. 
Result so far: 25698.7138
The remainder is 436 after subtracting 5424 from 5860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Moving on to step 13:
678 goes into 4360 6 times with a remainder of 292.
Use 6 as the next digit of our solution. 
Result so far: 25698.71386
Subtracting 4068 from 4360 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Going ahead to step 14:
The number 678 fits into 2920 4 times, leaving a remainder of 208.
Record the quotient 4 as the next digit in the result. 
Result so far: 25698.713864
The remainder is 208 after subtracting 2712 from 2920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Step 15:
678 can be fit into 2080 3 times, resulting in a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 25698.7138643
The remainder is 46 after subtracting 2034 from 2080.
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 16:
460 divided by 678 is 0 with a remainder of 460.
Put 0 as the next digit of the answer. 
Result so far: 25698.7138643
If we subtract 0 from 460, we get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

The final result is 25698.7138643 with a remainder of 4.6e-07.