630343 ÷ 51 
The aim is to understand the frequency of 51 in 630343.

Advancing to step 1:
51 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 51

Moving on to step 2:
When dividing 63 by 51, we get 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 51 from 63, we get 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 51

Going ahead to step 3:
120 divided by 51 is 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 102 from 120 and we're left with 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 51

On to step 4:
183 divided by 51 is 3 with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 123.0
Subtracting 153 from 183 leaves us with 30.
Include the next digit (4) from the dividend after 30, then repeat: 304 / 51

Moving on to step 5:
304 divided by 51 is 5 with a remainder of 49.
The next digit of our result is 5. 
Result so far: 1235.0
Subtract 255 from 304 to get 49.
Take the next digit (3) from the dividend and append it to 49, then repeat: 493 / 51

Going ahead to step 6:
The number 51 fits into 493 9 times, leaving a remainder of 34.
Record the quotient 9 as the next digit in the result. 
Result so far: 12359.0
The remainder is 34 after subtracting 459 from 493.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 7:
When dividing 340 by 51, we get 6 with a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 12359.6
Subtracting 306 from 340 leaves us with 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 8:
340 divided by 51 is 6 with a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 12359.66
If we take 306 away from 340, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Our division results in 12359.66 with a remaining 0.034.