19939908 divided by 77 
The aim is to understand the frequency of 77 in 19939908.

On to step 1:
The number 77 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 77

Going ahead to step 2:
77 can be fit into 19 0 times, resulting in a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 19 leaves us with 19.
Include the next digit (9) from the dividend after 19, then repeat: 199 / 77

Step 3:
The number 77 fits into 199 2 times, leaving a remainder of 45.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 154 from 199, we get 45.
Append the next digit (3) from the dividend to 45 and continue with: 453 / 77

On to step 4:
The number 77 fits into 453 5 times, leaving a remainder of 68.
Write down 5 as next digit of the result. 
Result so far: 25.0
Subtracting 385 from 453 leaves us with 68.
Include the next digit (9) from the dividend after 68, then repeat: 689 / 77

Advancing to step 5:
77 can be fit into 689 8 times, resulting in a remainder of 73.
Record the quotient 8 as the next digit in the result. 
Result so far: 258.0
Deduct 616 from 689 and we're left with 73.
Append the next digit (9) from the dividend to 73 and continue with: 739 / 77

Let's proceed to step 6:
If we divide 739 by 77, we get 9 and a remainder of 46.
Record the quotient 9 as the next digit in the result. 
Result so far: 2589.0
Subtracting 693 from 739 leaves us with 46.
Bring next digit (0) of the dividend behind the 46 and repeat the process: 460 / 77

Step 7:
77 goes into 460 5 times with a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 25895.0
If we subtract 385 from 460, we get 75.
Include the next digit (8) from the dividend after 75, then repeat: 758 / 77

Going ahead to step 8:
The number 77 fits into 758 9 times, leaving a remainder of 65.
The next digit of our result is 9. 
Result so far: 258959.0
If we take 693 away from 758, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 9:
77 goes into 650 8 times with a remainder of 34.
The next digit of our result is 8. 
Result so far: 258959.8
Subtract 616 from 650 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
77 goes into 340 4 times with a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 258959.84
Deduct 308 from 340 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 11:
320 divided by 77 is 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 258959.844
Subtracting 308 from 320 leaves us 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.

After the division, we end up with 258959.844 and a remainder of 0.0012.