144558 ÷ 12 
The aim is to understand the frequency of 12 in 144558.

Step 1:
When dividing 1 by 12, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 12

Going ahead to step 2:
When dividing 14 by 12, we get 1 with a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 12 from 14, we get 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 12

Advancing to step 3:
24 divided by 12 is 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 24 from 24, we get 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 12

Step 4:
12 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 12

On to step 5:
If we divide 55 by 12, we get 4 and a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 1204.0
The remainder is 7 after subtracting 48 from 55.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 12

Moving on to step 6:
The number 12 fits into 78 6 times, leaving a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 12046.0
If we subtract 72 from 78, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
60 divided by 12 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 12046.5
Deduct 60 from 60 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.

Moving on to step 8:
If we divide 0 by 12, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12046.5
Subtract 0 from 0 to get 0.
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.
The next digit of our result is 0. 
Result so far: 12046.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 12046.5 with a remaining 0.0.