We're dividing 630479 by 51 
The aim is to understand the frequency of 51 in 630479.

Going ahead to step 1:
If we divide 6 by 51, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 51

Advancing to step 2:
51 can be fit into 63 1 times, resulting in a remainder of 12.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 51 from 63 to get 12.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 51

Moving on to step 3:
51 goes into 120 2 times with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 102 away from 120, we end up with 18.
Append the next digit (4) from the dividend to 18 and continue with: 184 / 51

Step 4:
The number 51 fits into 184 3 times, leaving a remainder of 31.
Record the quotient 3 as the next digit in the result. 
Result so far: 123.0
If we subtract 153 from 184, we get 31.
Grab the next digit (7) from the dividend, add it to 31, then carry on: 317 / 51

Let's proceed to step 5:
51 goes into 317 6 times with a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 1236.0
Subtract 306 from 317 to get 11.
Include the next digit (9) from the dividend after 11, then repeat: 119 / 51

Going ahead to step 6:
119 divided by 51 is 2 with a remainder of 17.
The number 2 becomes the next digit in our result. 
Result so far: 12362.0
If we subtract 102 from 119, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
51 can be fit into 170 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 12362.3
If we take 153 away from 170, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 8:
If we divide 170 by 51, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 12362.33
If we subtract 153 from 170, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

After the division, we end up with 12362.33 and a remainder of 0.017.