345972 divided by 12 
The aim is to understand the frequency of 12 in 345972.

Moving on to step 1:
When dividing 3 by 12, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 12

Step 2:
12 goes into 34 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 24 away from 34, we end up with 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 12

Step 3:
The number 12 fits into 105 8 times, leaving a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
Deduct 96 from 105 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 12

On to step 4:
12 can be fit into 99 8 times, resulting in a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 288.0
Subtracting 96 from 99 leaves us with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 12

Step 5:
When dividing 37 by 12, we get 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 2883.0
If we take 36 away from 37, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 12

Let's proceed to step 6:
12 goes into 12 1 times with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 28831.0
If we take 12 away from 12, 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.

Advancing to step 7:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 28831.0
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.

Let's proceed to step 8:
0 divided by 12 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 28831.0
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.

The final outcome is 28831.0, with a leftover of 0.0.