Let's divide 21849 by 12
The aim is to understand the frequency of 12 in 21849.

Advancing to step 1:
When dividing 2 by 12, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 12

Step 2:
12 can be fit into 21 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 12 from 21 and we're left with 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 12

Going ahead to step 3:
12 goes into 98 8 times with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 96 from 98, we get 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 12

Step 4:
12 goes into 24 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 182.0
The remainder is 0 after subtracting 24 from 24.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 12

Going ahead to step 5:
12 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 1820.0
The remainder is 9 after subtracting 0 from 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 6:
When dividing 90 by 12, we get 7 with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 1820.7
If we subtract 84 from 90, 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.

Let's proceed to step 7:
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: 1820.75
Subtract 60 from 60 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.

Let's proceed to step 8:
When dividing 0 by 12, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1820.75
Subtracting 0 from 0 leaves us 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.

Step 9:
12 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1820.75
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.

The quotient of the division is 1820.75, and the remainder is 0.0.