We look at the division of 398392 by 63 
The aim is to understand the frequency of 63 in 398392.

Advancing to step 1:
3 divided by 63 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 63

Step 2:
39 divided by 63 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Take the next digit (8) from the dividend and append it to 39, then repeat: 398 / 63

On to step 3:
63 goes into 398 6 times with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 378 from 398 and we're left with 20.
Grab the next digit (3) from the dividend, add it to 20, then carry on: 203 / 63

On to step 4:
The number 63 fits into 203 3 times, leaving a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 63.0
Subtract 189 from 203 to get 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 63

Let's proceed to step 5:
When dividing 149 by 63, we get 2 with a remainder of 23.
The next digit of our result is 2. 
Result so far: 632.0
If we subtract 126 from 149, we get 23.
Grab the next digit (2) from the dividend, add it to 23, then carry on: 232 / 63

Going ahead to step 6:
If we divide 232 by 63, we get 3 and a remainder of 43.
Use 3 as the next digit of our solution. 
Result so far: 6323.0
Subtracting 189 from 232 leaves us 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.

Moving on to step 7:
63 goes into 430 6 times with a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 6323.6
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.

Going ahead to step 8:
If we divide 520 by 63, we get 8 and a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 6323.68
If we subtract 504 from 520, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
The number 63 fits into 160 2 times, leaving a remainder of 34.
Put 2 as the next digit of the answer. 
Result so far: 6323.682
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.

Step 10:
When dividing 340 by 63, we get 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 6323.6825
The remainder is 25 after subtracting 315 from 340.
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 11:
When dividing 250 by 63, we get 3 with a remainder of 61.
Put 3 as the next digit of the answer. 
Result so far: 6323.68253
Subtract 189 from 250 to 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.

Advancing to step 12:
63 can be fit into 610 9 times, resulting in a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 6323.682539
Subtracting 567 from 610 leaves us 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.

Step 13:
430 divided by 63 is 6 with a remainder of 52.
The next digit of our result is 6. 
Result so far: 6323.6825396
Subtract 378 from 430 to 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.

Step 14:
When dividing 520 by 63, we get 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 6323.68253968
If we subtract 504 from 520, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 6323.68253968, and the remainder is 1.6e-08.