We look at the division of 745423 by 12 
The aim is to understand the frequency of 12 in 745423.

Going ahead to step 1:
12 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 12

Moving on to step 2:
12 goes into 74 6 times with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 72 from 74, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 12

Let's proceed to step 3:
25 divided by 12 is 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 62.0
Subtract 24 from 25 to get 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 12

Advancing to step 4:
12 goes into 14 1 times with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 621.0
Subtracting 12 from 14 leaves us with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 12

On to step 5:
12 goes into 22 1 times with a remainder of 10.
The next digit of our result is 1. 
Result so far: 6211.0
Deduct 12 from 22 and we're left with 10.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 12

Going ahead to step 6:
103 divided by 12 is 8 with a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 62118.0
If we take 96 away from 103, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
12 can be fit into 70 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 62118.5
If we take 60 away from 70, we end up 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.

On to step 8:
When dividing 100 by 12, we get 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 62118.58
Subtract 96 from 100 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.

Moving on to step 9:
40 divided by 12 is 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 62118.583
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 10:
40 divided by 12 is 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 62118.5833
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.

After the division, we end up with 62118.5833 and a remainder of 4e-05.