We're dividing 45819 by 12 
The aim is to understand the frequency of 12 in 45819.

Going ahead to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 12

Let's proceed to step 2:
When dividing 45 by 12, we get 3 with a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 36 from 45, we get 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 12

Advancing to step 3:
The number 12 fits into 98 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Deduct 96 from 98 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 12

On to step 4:
When dividing 21 by 12, we get 1 with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 381.0
If we subtract 12 from 21, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 12

On to step 5:
When dividing 99 by 12, we get 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 3818.0
If we take 96 away from 99, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 6:
When dividing 30 by 12, we get 2 with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 3818.2
Subtract 24 from 30 to 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.

Going ahead to step 7:
The number 12 fits into 60 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 3818.25
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.

Let's proceed to step 8:
12 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 3818.25
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 12, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 3818.25
If we take 0 away from 0, we end up 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.

Our division results in 3818.25 with a remaining 0.0.