We're dividing 8448531 by 630 
The aim is to understand the frequency of 630 in 8448531.

Step 1:
630 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 630

Going ahead to step 2:
The number 630 fits into 84 0 times, leaving a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 84 and we're left with 84.
Bring next digit (4) of the dividend behind the 84 and repeat the process: 844 / 630

Let's proceed to step 3:
If we divide 844 by 630, we get 1 and a remainder of 214.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 630 away from 844, we end up with 214.
Include the next digit (8) from the dividend after 214, then repeat: 2148 / 630

Step 4:
630 goes into 2148 3 times with a remainder of 258.
Put 3 as the next digit of the answer. 
Result so far: 13.0
The remainder is 258 after subtracting 1890 from 2148.
Include the next digit (5) from the dividend after 258, then repeat: 2585 / 630

Moving on to step 5:
When dividing 2585 by 630, we get 4 with a remainder of 65.
The number 4 becomes the next digit in our result. 
Result so far: 134.0
If we take 2520 away from 2585, we end up with 65.
Include the next digit (3) from the dividend after 65, then repeat: 653 / 630

Step 6:
630 can be fit into 653 1 times, resulting in a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 1341.0
Deduct 630 from 653 and we're left with 23.
Fetch the next digit (1) from the dividend, attach it to 23 and continue: 231 / 630

Moving on to step 7:
630 goes into 231 0 times with a remainder of 231.
Put 0 as the next digit of the answer. 
Result so far: 13410.0
Subtracting 0 from 231 leaves us with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Moving on to step 8:
If we divide 2310 by 630, we get 3 and a remainder of 420.
Put 3 as the next digit of the answer. 
Result so far: 13410.3
The remainder is 420 after subtracting 1890 from 2310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

On to step 9:
4200 divided by 630 is 6 with a remainder of 420.
Record the quotient 6 as the next digit in the result. 
Result so far: 13410.36
The remainder is 420 after subtracting 3780 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Advancing to step 10:
If we divide 4200 by 630, we get 6 and a remainder of 420.
Record the quotient 6 as the next digit in the result. 
Result so far: 13410.366
The remainder is 420 after subtracting 3780 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Our division results in 13410.366 with a remaining 0.042.