We're dividing 663801 by 51 
The aim is to understand the frequency of 51 in 663801.

Let's proceed to step 1:
The number 51 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 51

Step 2:
66 divided by 51 is 1 with a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 51 from 66 leaves us with 15.
Include the next digit (3) from the dividend after 15, then repeat: 153 / 51

Step 3:
51 goes into 153 3 times with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 0 after subtracting 153 from 153.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 51

Moving on to step 4:
If we divide 8 by 51, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 130.0
Subtract 0 from 8 to get 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 51

On to step 5:
51 can be fit into 80 1 times, resulting in a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 1301.0
The remainder is 29 after subtracting 51 from 80.
Take the next digit (1) from the dividend and append it to 29, then repeat: 291 / 51

Going ahead to step 6:
When dividing 291 by 51, we get 5 with a remainder of 36.
Write down 5 as next digit of the result. 
Result so far: 13015.0
Subtracting 255 from 291 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 7:
51 can be fit into 360 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 13015.7
The remainder is 3 after subtracting 357 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 8:
30 divided by 51 is 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 13015.7
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
51 can be fit into 300 5 times, resulting in a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 13015.705
Deduct 255 from 300 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 10:
51 can be fit into 450 8 times, resulting in a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 13015.7058
The remainder is 42 after subtracting 408 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 11:
51 goes into 420 8 times with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 13015.70588
If we subtract 408 from 420, we 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.

Our division results in 13015.70588 with a remaining 1.2e-05.