99243370 ÷ 678 
The aim is to understand the frequency of 678 in 99243370.

Going ahead to step 1:
678 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 678

Advancing to step 2:
If we divide 99 by 678, we get 0 and a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 99 and we're left with 99.
Take the next digit (2) from the dividend and append it to 99, then repeat: 992 / 678

Step 3:
If we divide 992 by 678, we get 1 and a remainder of 314.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 678 from 992, we get 314.
Take the next digit (4) from the dividend and append it to 314, then repeat: 3144 / 678

Step 4:
678 can be fit into 3144 4 times, resulting in a remainder of 432.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
If we take 2712 away from 3144, we end up with 432.
Append the next digit (3) from the dividend to 432 and continue with: 4323 / 678

On to step 5:
4323 divided by 678 is 6 with a remainder of 255.
Record the quotient 6 as the next digit in the result. 
Result so far: 146.0
The remainder is 255 after subtracting 4068 from 4323.
Append the next digit (3) from the dividend to 255 and continue with: 2553 / 678

On to step 6:
The number 678 fits into 2553 3 times, leaving a remainder of 519.
Put 3 as the next digit of the answer. 
Result so far: 1463.0
Subtract 2034 from 2553 to get 519.
Fetch the next digit (7) from the dividend, attach it to 519 and continue: 5197 / 678

Going ahead to step 7:
When dividing 5197 by 678, we get 7 with a remainder of 451.
Use 7 as the next digit of our solution. 
Result so far: 14637.0
Subtracting 4746 from 5197 leaves us with 451.
Grab the next digit (0) from the dividend, add it to 451, then carry on: 4510 / 678

Step 8:
If we divide 4510 by 678, we get 6 and a remainder of 442.
Use 6 as the next digit of our solution. 
Result so far: 146376.0
If we take 4068 away from 4510, we end up with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Moving on to step 9:
The number 678 fits into 4420 6 times, leaving a remainder of 352.
The next digit of our result is 6. 
Result so far: 146376.6
The remainder is 352 after subtracting 4068 from 4420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Step 10:
678 goes into 3520 5 times with a remainder of 130.
The next digit of our result is 5. 
Result so far: 146376.65
If we subtract 3390 from 3520, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 11:
If we divide 1300 by 678, we get 1 and a remainder of 622.
The next digit of our result is 1. 
Result so far: 146376.651
The remainder is 622 after subtracting 678 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Advancing to step 12:
678 can be fit into 6220 9 times, resulting in a remainder of 118.
The next digit of our result is 9. 
Result so far: 146376.6519
The remainder is 118 after subtracting 6102 from 6220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 13:
When dividing 1180 by 678, we get 1 with a remainder of 502.
Put 1 as the next digit of the answer. 
Result so far: 146376.65191
If we take 678 away from 1180, we end up with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

Step 14:
The number 678 fits into 5020 7 times, leaving a remainder of 274.
Write down 7 as next digit of the result. 
Result so far: 146376.651917
Subtracting 4746 from 5020 leaves us with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Going ahead to step 15:
When dividing 2740 by 678, we get 4 with a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 146376.6519174
The remainder is 28 after subtracting 2712 from 2740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 16:
If we divide 280 by 678, we get 0 and a remainder of 280.
Use 0 as the next digit of our solution. 
Result so far: 146376.6519174
Deduct 0 from 280 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

After the division, we end up with 146376.6519174 and a remainder of 2.8e-07.