77194521 ÷ 668 
The aim is to understand the frequency of 668 in 77194521.

On to step 1:
The number 668 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 668

Let's proceed to step 2:
The number 668 fits into 77 0 times, leaving a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Append the next digit (1) from the dividend to 77 and continue with: 771 / 668

On to step 3:
771 divided by 668 is 1 with a remainder of 103.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 668 from 771, we get 103.
Grab the next digit (9) from the dividend, add it to 103, then carry on: 1039 / 668

Advancing to step 4:
668 can be fit into 1039 1 times, resulting in a remainder of 371.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 668 from 1039 to get 371.
Grab the next digit (4) from the dividend, add it to 371, then carry on: 3714 / 668

Advancing to step 5:
If we divide 3714 by 668, we get 5 and a remainder of 374.
The next digit of our result is 5. 
Result so far: 115.0
If we subtract 3340 from 3714, we get 374.
Include the next digit (5) from the dividend after 374, then repeat: 3745 / 668

Moving on to step 6:
When dividing 3745 by 668, we get 5 with a remainder of 405.
Write down 5 as next digit of the result. 
Result so far: 1155.0
If we take 3340 away from 3745, we end up with 405.
Bring next digit (2) of the dividend behind the 405 and repeat the process: 4052 / 668

Let's proceed to step 7:
668 can be fit into 4052 6 times, resulting in a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 11556.0
Subtracting 4008 from 4052 leaves us with 44.
Take the next digit (1) from the dividend and append it to 44, then repeat: 441 / 668

Step 8:
441 divided by 668 is 0 with a remainder of 441.
Put 0 as the next digit of the answer. 
Result so far: 115560.0
Subtracting 0 from 441 leaves us with 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Moving on to step 9:
668 can be fit into 4410 6 times, resulting in a remainder of 402.
Put 6 as the next digit of the answer. 
Result so far: 115560.6
The remainder is 402 after subtracting 4008 from 4410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Moving on to step 10:
If we divide 4020 by 668, we get 6 and a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 115560.66
Deduct 4008 from 4020 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 115560.66 with a remainder of 0.012.