We're dividing 140286 by 12 
The aim is to understand the frequency of 12 in 140286.

Advancing to step 1:
If we divide 1 by 12, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 12

Advancing to step 2:
If we divide 14 by 12, we get 1 and a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 2 after subtracting 12 from 14.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 12

Moving on to step 3:
If we divide 20 by 12, we get 1 and a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtracting 12 from 20 leaves us with 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 12

Step 4:
When dividing 82 by 12, we get 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
If we take 72 away from 82, we end up with 10.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 12

Going ahead to step 5:
12 goes into 108 9 times with a remainder of 0.
The next digit of our result is 9. 
Result so far: 1169.0
Subtracting 108 from 108 leaves us with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 12

Going ahead to step 6:
The number 12 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 11690.0
If we subtract 0 from 6, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
12 goes into 60 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 11690.5
If we subtract 60 from 60, we 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.

Let's proceed to step 8:
When dividing 0 by 12, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 11690.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
If we divide 0 by 12, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 11690.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 11690.5 and a remainder of 0.0.