We're dividing 12712126 by 852 
The aim is to understand the frequency of 852 in 12712126.

On to step 1:
852 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 852

Going ahead to step 2:
The number 852 fits into 12 0 times, leaving a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Take the next digit (7) from the dividend and append it to 12, then repeat: 127 / 852

Advancing to step 3:
The number 852 fits into 127 0 times, leaving a remainder of 127.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 127 after subtracting 0 from 127.
Bring next digit (1) of the dividend behind the 127 and repeat the process: 1271 / 852

Moving on to step 4:
1271 divided by 852 is 1 with a remainder of 419.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 852 away from 1271, we end up with 419.
Take the next digit (2) from the dividend and append it to 419, then repeat: 4192 / 852

On to step 5:
The number 852 fits into 4192 4 times, leaving a remainder of 784.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 784 after subtracting 3408 from 4192.
Grab the next digit (1) from the dividend, add it to 784, then carry on: 7841 / 852

Advancing to step 6:
When dividing 7841 by 852, we get 9 with a remainder of 173.
The number 9 becomes the next digit in our result. 
Result so far: 149.0
Subtract 7668 from 7841 to get 173.
Append the next digit (2) from the dividend to 173 and continue with: 1732 / 852

Step 7:
1732 divided by 852 is 2 with a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 1492.0
Subtract 1704 from 1732 to get 28.
Grab the next digit (6) from the dividend, add it to 28, then carry on: 286 / 852

Advancing to step 8:
852 can be fit into 286 0 times, resulting in a remainder of 286.
Write down 0 as next digit of the result. 
Result so far: 14920.0
If we take 0 away from 286, we end up with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

On to step 9:
852 goes into 2860 3 times with a remainder of 304.
Write down 3 as next digit of the result. 
Result so far: 14920.3
If we take 2556 away from 2860, we end up with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Let's proceed to step 10:
The number 852 fits into 3040 3 times, leaving a remainder of 484.
Write down 3 as next digit of the result. 
Result so far: 14920.33
If we subtract 2556 from 3040, we get 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Our division results in 14920.33 with a remaining 0.484.