We look at the division of 63310638 by 77 
The aim is to understand the frequency of 77 in 63310638.

On to step 1:
77 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 77

Advancing to step 2:
The number 77 fits into 63 0 times, leaving a remainder of 63.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Append the next digit (3) from the dividend to 63 and continue with: 633 / 77

Going ahead to step 3:
77 goes into 633 8 times with a remainder of 17.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 616 away from 633, we end up with 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 77

Moving on to step 4:
When dividing 171 by 77, we get 2 with a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 82.0
If we take 154 away from 171, we end up with 17.
Bring next digit (0) of the dividend behind the 17 and repeat the process: 170 / 77

Advancing to step 5:
77 can be fit into 170 2 times, resulting in a remainder of 16.
The next digit of our result is 2. 
Result so far: 822.0
If we subtract 154 from 170, we get 16.
Append the next digit (6) from the dividend to 16 and continue with: 166 / 77

Let's proceed to step 6:
If we divide 166 by 77, we get 2 and a remainder of 12.
The next digit of our result is 2. 
Result so far: 8222.0
Deduct 154 from 166 and we're left with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 77

On to step 7:
The number 77 fits into 123 1 times, leaving a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 82221.0
The remainder is 46 after subtracting 77 from 123.
Fetch the next digit (8) from the dividend, attach it to 46 and continue: 468 / 77

Moving on to step 8:
When dividing 468 by 77, we get 6 with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 822216.0
The remainder is 6 after subtracting 462 from 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 9:
The number 77 fits into 60 0 times, leaving a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 822216.0
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 10:
The number 77 fits into 600 7 times, leaving a remainder of 61.
The next digit of our result is 7. 
Result so far: 822216.07
The remainder is 61 after subtracting 539 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 11:
The number 77 fits into 610 7 times, leaving a remainder of 71.
Use 7 as the next digit of our solution. 
Result so far: 822216.077
The remainder is 71 after subtracting 539 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Our division results in 822216.077 with a remaining 0.0071.