We look at the division of 28338631 by 63 
The aim is to understand the frequency of 63 in 28338631.

Step 1:
When dividing 2 by 63, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 63

Let's proceed to step 2:
When dividing 28 by 63, we get 0 with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Bring next digit (3) of the dividend behind the 28 and repeat the process: 283 / 63

Advancing to step 3:
283 divided by 63 is 4 with a remainder of 31.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 252 away from 283, we end up with 31.
Grab the next digit (3) from the dividend, add it to 31, then carry on: 313 / 63

Advancing to step 4:
When dividing 313 by 63, we get 4 with a remainder of 61.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
If we take 252 away from 313, we end up with 61.
Bring next digit (8) of the dividend behind the 61 and repeat the process: 618 / 63

On to step 5:
63 can be fit into 618 9 times, resulting in a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 449.0
Subtracting 567 from 618 leaves us with 51.
Bring next digit (6) of the dividend behind the 51 and repeat the process: 516 / 63

On to step 6:
The number 63 fits into 516 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 4498.0
Deduct 504 from 516 and we're left with 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 63

Going ahead to step 7:
When dividing 123 by 63, we get 1 with a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 44981.0
The remainder is 60 after subtracting 63 from 123.
Include the next digit (1) from the dividend after 60, then repeat: 601 / 63

Moving on to step 8:
601 divided by 63 is 9 with a remainder of 34.
The next digit of our result is 9. 
Result so far: 449819.0
Subtract 567 from 601 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.

On to step 9:
63 goes into 340 5 times with a remainder of 25.
The next digit of our result is 5. 
Result so far: 449819.5
Subtracting 315 from 340 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 10:
When dividing 250 by 63, we get 3 with a remainder of 61.
Use 3 as the next digit of our solution. 
Result so far: 449819.53
If we subtract 189 from 250, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 11:
If we divide 610 by 63, we get 9 and a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 449819.539
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 12:
The number 63 fits into 430 6 times, leaving a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 449819.5396
If we subtract 378 from 430, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 13:
63 can be fit into 520 8 times, resulting in a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 449819.53968
Subtracting 504 from 520 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
160 divided by 63 is 2 with a remainder of 34.
The next digit of our result is 2. 
Result so far: 449819.539682
Subtract 126 from 160 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 15:
If we divide 340 by 63, we get 5 and a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 449819.5396825
Subtract 315 from 340 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 16:
63 can be fit into 250 3 times, resulting in a remainder of 61.
Record the quotient 3 as the next digit in the result. 
Result so far: 449819.53968253
If we take 189 away from 250, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

After the division, we end up with 449819.53968253 and a remainder of 6.1e-08.