We look at the division of 12093378 by 396 
The aim is to understand the frequency of 396 in 12093378.

Step 1:
If we divide 1 by 396, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 396

Let's proceed to step 2:
When dividing 12 by 396, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 396

Let's proceed to step 3:
396 can be fit into 120 0 times, resulting in a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 120 and we're left with 120.
Fetch the next digit (9) from the dividend, attach it to 120 and continue: 1209 / 396

Advancing to step 4:
When dividing 1209 by 396, we get 3 with a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 21 after subtracting 1188 from 1209.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 396

On to step 5:
396 can be fit into 213 0 times, resulting in a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 30.0
Deduct 0 from 213 and we're left with 213.
Append the next digit (3) from the dividend to 213 and continue with: 2133 / 396

Advancing to step 6:
If we divide 2133 by 396, we get 5 and a remainder of 153.
Write down 5 as next digit of the result. 
Result so far: 305.0
If we take 1980 away from 2133, we end up with 153.
Take the next digit (7) from the dividend and append it to 153, then repeat: 1537 / 396

Step 7:
When dividing 1537 by 396, we get 3 with a remainder of 349.
Put 3 as the next digit of the answer. 
Result so far: 3053.0
Subtracting 1188 from 1537 leaves us with 349.
Fetch the next digit (8) from the dividend, attach it to 349 and continue: 3498 / 396

Advancing to step 8:
396 can be fit into 3498 8 times, resulting in a remainder of 330.
Record the quotient 8 as the next digit in the result. 
Result so far: 30538.0
If we subtract 3168 from 3498, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Advancing to step 9:
When dividing 3300 by 396, we get 8 with a remainder of 132.
The number 8 becomes the next digit in our result. 
Result so far: 30538.8
If we subtract 3168 from 3300, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Step 10:
When dividing 1320 by 396, we get 3 with a remainder of 132.
Write down 3 as next digit of the result. 
Result so far: 30538.83
If we take 1188 away from 1320, we end up with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

On to step 11:
When dividing 1320 by 396, we get 3 with a remainder of 132.
Use 3 as the next digit of our solution. 
Result so far: 30538.833
Subtracting 1188 from 1320 leaves us with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

The final result is 30538.833 with a remainder of 0.0132.