141820 ÷ 12 
The aim is to understand the frequency of 12 in 141820.

Advancing to step 1:
The number 12 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 12

On to step 2:
If we divide 14 by 12, we get 1 and a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 12 from 14 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 12

Going ahead to step 3:
21 divided by 12 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 12 away from 21, we end up with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 12

Going ahead to step 4:
12 can be fit into 98 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 118.0
If we take 96 away from 98, we end up with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 12

Let's proceed to step 5:
12 goes into 22 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1181.0
Deduct 12 from 22 and we're left with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 12

Moving on to step 6:
12 goes into 100 8 times with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 11818.0
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.

Step 7:
12 goes into 40 3 times with a remainder of 4.
The next digit of our result is 3. 
Result so far: 11818.3
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.

Let's proceed to step 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 11818.33
Subtract 36 from 40 to get 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 outcome is 11818.33, with a leftover of 0.004.