Let's divide 66817628 by 678
The aim is to understand the frequency of 678 in 66817628.

Moving on to step 1:
678 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 678

Step 2:
678 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (8) from the dividend, attach it to 66 and continue: 668 / 678

Let's proceed to step 3:
678 can be fit into 668 0 times, resulting in a remainder of 668.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 668 after subtracting 0 from 668.
Take the next digit (1) from the dividend and append it to 668, then repeat: 6681 / 678

Advancing to step 4:
If we divide 6681 by 678, we get 9 and a remainder of 579.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 6102 from 6681, we get 579.
Append the next digit (7) from the dividend to 579 and continue with: 5797 / 678

Advancing to step 5:
678 can be fit into 5797 8 times, resulting in a remainder of 373.
Use 8 as the next digit of our solution. 
Result so far: 98.0
Subtract 5424 from 5797 to get 373.
Fetch the next digit (6) from the dividend, attach it to 373 and continue: 3736 / 678

Going ahead to step 6:
3736 divided by 678 is 5 with a remainder of 346.
Put 5 as the next digit of the answer. 
Result so far: 985.0
If we take 3390 away from 3736, we end up with 346.
Fetch the next digit (2) from the dividend, attach it to 346 and continue: 3462 / 678

On to step 7:
When dividing 3462 by 678, we get 5 with a remainder of 72.
Use 5 as the next digit of our solution. 
Result so far: 9855.0
Subtract 3390 from 3462 to get 72.
Fetch the next digit (8) from the dividend, attach it to 72 and continue: 728 / 678

Moving on to step 8:
728 divided by 678 is 1 with a remainder of 50.
The next digit of our result is 1. 
Result so far: 98551.0
Subtract 678 from 728 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
678 goes into 500 0 times with a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 98551.0
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 10:
The number 678 fits into 5000 7 times, leaving a remainder of 254.
Use 7 as the next digit of our solution. 
Result so far: 98551.07
If we take 4746 away from 5000, we end up with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Let's proceed to step 11:
2540 divided by 678 is 3 with a remainder of 506.
Record the quotient 3 as the next digit in the result. 
Result so far: 98551.073
If we subtract 2034 from 2540, we get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Advancing to step 12:
5060 divided by 678 is 7 with a remainder of 314.
Record the quotient 7 as the next digit in the result. 
Result so far: 98551.0737
If we subtract 4746 from 5060, we get 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Moving on to step 13:
3140 divided by 678 is 4 with a remainder of 428.
Write down 4 as next digit of the result. 
Result so far: 98551.07374
The remainder is 428 after subtracting 2712 from 3140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Going ahead to step 14:
If we divide 4280 by 678, we get 6 and a remainder of 212.
The number 6 becomes the next digit in our result. 
Result so far: 98551.073746
Deduct 4068 from 4280 and we're left with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Let's proceed to step 15:
678 goes into 2120 3 times with a remainder of 86.
Record the quotient 3 as the next digit in the result. 
Result so far: 98551.0737463
Subtracting 2034 from 2120 leaves us with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Moving on to step 16:
When dividing 860 by 678, we get 1 with a remainder of 182.
The number 1 becomes the next digit in our result. 
Result so far: 98551.07374631
If we take 678 away from 860, we end up with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

The final result is 98551.07374631 with a remainder of 1.82e-07.