146581 divided by 12 
The aim is to understand the frequency of 12 in 146581.

Advancing to step 1:
12 can be fit into 1 0 times, resulting in 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.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 12

Moving on to step 2:
14 divided by 12 is 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 2 after subtracting 12 from 14.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 12

On to step 3:
12 can be fit into 26 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 24 from 26 to get 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 12

Going ahead to step 4:
25 divided by 12 is 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 122.0
Deduct 24 from 25 and we're left with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 12

On to step 5:
When dividing 18 by 12, we get 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 1221.0
Subtracting 12 from 18 leaves us with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 12

Going ahead to step 6:
When dividing 61 by 12, we get 5 with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 12215.0
If we take 60 away from 61, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
When dividing 10 by 12, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 12215.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
When dividing 100 by 12, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 12215.08
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.

Let's proceed to step 9:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 12215.083
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.

Moving on to step 10:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 12215.0833
If we subtract 36 from 40, we 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 12215.0833, with a leftover of 4e-05.