53066050 divided by 12 
The aim is to understand the frequency of 12 in 53066050.

Going ahead to step 1:
12 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 12

On to step 2:
The number 12 fits into 53 4 times, leaving a remainder of 5.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 48 from 53 and we're left with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 12

Advancing to step 3:
50 divided by 12 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 44.0
If we subtract 48 from 50, we get 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 12

Moving on to step 4:
The number 12 fits into 26 2 times, leaving a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 442.0
If we subtract 24 from 26, we get 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 12

Let's proceed to step 5:
12 can be fit into 26 2 times, resulting in a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 4422.0
Subtract 24 from 26 to get 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 12

On to step 6:
20 divided by 12 is 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 44221.0
If we subtract 12 from 20, we get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 12

Step 7:
The number 12 fits into 85 7 times, leaving a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 442217.0
The remainder is 1 after subtracting 84 from 85.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 12

Let's proceed to step 8:
If we divide 10 by 12, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 4422170.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
12 goes into 100 8 times with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 4422170.8
The remainder is 4 after subtracting 96 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
When dividing 40 by 12, we get 3 with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 4422170.83
If we take 36 away from 40, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
If we divide 40 by 12, we get 3 and a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 4422170.833
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 4422170.833 with a remainder of 0.0004.