We look at the division of 783874 by 12 
The aim is to understand the frequency of 12 in 783874.

Advancing to step 1:
If we divide 7 by 12, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 12

Moving on to step 2:
12 goes into 78 6 times with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 72 from 78, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 12

Advancing to step 3:
63 divided by 12 is 5 with a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 65.0
Subtract 60 from 63 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 12

Advancing to step 4:
If we divide 38 by 12, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 653.0
Subtract 36 from 38 to get 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 12

Let's proceed to step 5:
27 divided by 12 is 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 6532.0
Deduct 24 from 27 and we're left with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 12

Step 6:
34 divided by 12 is 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 65322.0
If we take 24 away from 34, 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.

Going ahead to step 7:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 65322.8
Deduct 96 from 100 and we're left 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.

Going ahead to step 8:
40 divided by 12 is 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 65322.83
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.

Advancing 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: 65322.833
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.

In conclusion, the division gives 65322.833 with a balance of 0.0004.