525039 divided by 12 
The aim is to understand the frequency of 12 in 525039.

On to step 1:
The number 12 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 12

Let's proceed to step 2:
12 goes into 52 4 times with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 48 from 52, we get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 12

Step 3:
12 can be fit into 45 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 43.0
Deduct 36 from 45 and we're left with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 12

Moving on to step 4:
12 goes into 90 7 times with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 437.0
Subtracting 84 from 90 leaves us with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 12

Let's proceed to step 5:
If we divide 63 by 12, we get 5 and a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 4375.0
Deduct 60 from 63 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 12

Step 6:
If we divide 39 by 12, we get 3 and a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 43753.0
If we subtract 36 from 39, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
If we divide 30 by 12, we get 2 and a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 43753.2
If we take 24 away from 30, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
12 goes into 60 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 43753.25
The remainder is 0 after subtracting 60 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
12 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43753.25
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
12 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 43753.25
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 43753.25 with a balance of 0.0.