We look at the division of 936663 by 63 
The aim is to understand the frequency of 63 in 936663.

Let's proceed to step 1:
When dividing 9 by 63, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 63

Going ahead to step 2:
63 goes into 93 1 times with a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 63 from 93 leaves us with 30.
Grab the next digit (6) from the dividend, add it to 30, then carry on: 306 / 63

On to step 3:
If we divide 306 by 63, we get 4 and a remainder of 54.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 252 from 306, we get 54.
Append the next digit (6) from the dividend to 54 and continue with: 546 / 63

Let's proceed to step 4:
546 divided by 63 is 8 with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 148.0
The remainder is 42 after subtracting 504 from 546.
Append the next digit (6) from the dividend to 42 and continue with: 426 / 63

Advancing to step 5:
63 goes into 426 6 times with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 1486.0
Subtract 378 from 426 to get 48.
Grab the next digit (3) from the dividend, add it to 48, then carry on: 483 / 63

Let's proceed to step 6:
The number 63 fits into 483 7 times, leaving a remainder of 42.
Use 7 as the next digit of our solution. 
Result so far: 14867.0
Deduct 441 from 483 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 7:
If we divide 420 by 63, we get 6 and a remainder of 42.
The next digit of our result is 6. 
Result so far: 14867.6
If we subtract 378 from 420, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
When dividing 420 by 63, we get 6 with a remainder of 42.
Write down 6 as next digit of the result. 
Result so far: 14867.66
Subtracting 378 from 420 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The final result is 14867.66 with a remainder of 0.042.