Let's divide 254387 by 12
The aim is to understand the frequency of 12 in 254387.

Moving on to step 1:
The number 12 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 12

Advancing to step 2:
12 goes into 25 2 times with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 24 from 25, we get 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 12

Let's proceed to step 3:
14 divided by 12 is 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 21.0
Subtracting 12 from 14 leaves us with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 12

Step 4:
When dividing 23 by 12, we get 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 211.0
Subtracting 12 from 23 leaves us with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 12

Moving on to step 5:
When dividing 118 by 12, we get 9 with a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 2119.0
If we subtract 108 from 118, we get 10.
Fetch the next digit (7) from the dividend, attach it to 10 and continue: 107 / 12

On to step 6:
107 divided by 12 is 8 with a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 21198.0
Subtracting 96 from 107 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
When dividing 110 by 12, we get 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 21198.9
Subtracting 108 from 110 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
20 divided by 12 is 1 with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 21198.91
Subtracting 12 from 20 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
12 can be fit into 80 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 21198.916
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
The number 12 fits into 80 6 times, leaving a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 21198.9166
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 21198.9166, with a leftover of 8e-05.