We look at the division of 873804 by 63 
The aim is to understand the frequency of 63 in 873804.

On to step 1:
If we divide 8 by 63, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 63

Let's proceed to step 2:
63 can be fit into 87 1 times, resulting in a remainder of 24.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 24 after subtracting 63 from 87.
Take the next digit (3) from the dividend and append it to 24, then repeat: 243 / 63

Moving on to step 3:
243 divided by 63 is 3 with a remainder of 54.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 189 from 243, we get 54.
Include the next digit (8) from the dividend after 54, then repeat: 548 / 63

Going ahead to step 4:
The number 63 fits into 548 8 times, leaving a remainder of 44.
The number 8 becomes the next digit in our result. 
Result so far: 138.0
If we take 504 away from 548, we end up with 44.
Fetch the next digit (0) from the dividend, attach it to 44 and continue: 440 / 63

Going ahead to step 5:
If we divide 440 by 63, we get 6 and a remainder of 62.
Record the quotient 6 as the next digit in the result. 
Result so far: 1386.0
If we take 378 away from 440, we end up with 62.
Take the next digit (4) from the dividend and append it to 62, then repeat: 624 / 63

Advancing to step 6:
63 can be fit into 624 9 times, resulting in a remainder of 57.
Record the quotient 9 as the next digit in the result. 
Result so far: 13869.0
If we take 567 away from 624, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 7:
The number 63 fits into 570 9 times, leaving a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 13869.9
Subtract 567 from 570 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
30 divided by 63 is 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 13869.9
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
300 divided by 63 is 4 with a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 13869.904
Subtract 252 from 300 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 10:
63 can be fit into 480 7 times, resulting in a remainder of 39.
Use 7 as the next digit of our solution. 
Result so far: 13869.9047
If we subtract 441 from 480, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 11:
The number 63 fits into 390 6 times, leaving a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 13869.90476
Subtract 378 from 390 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 12:
The number 63 fits into 120 1 times, leaving a remainder of 57.
The next digit of our result is 1. 
Result so far: 13869.904761
Subtract 63 from 120 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 13:
If we divide 570 by 63, we get 9 and a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 13869.9047619
If we take 567 away from 570, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 14:
63 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 13869.9047619
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 13869.9047619 with a remaining 3e-08.