We look at the division of 35781 by 12 
The aim is to understand the frequency of 12 in 35781.

On to step 1:
12 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 12

Advancing to step 2:
The number 12 fits into 35 2 times, leaving a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 11 after subtracting 24 from 35.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 12

Advancing to step 3:
12 can be fit into 117 9 times, resulting in a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 29.0
If we take 108 away from 117, we end up with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 12

Going ahead to step 4:
98 divided by 12 is 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 298.0
Deduct 96 from 98 and we're left with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 12

Let's proceed to step 5:
The number 12 fits into 21 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 2981.0
If we take 12 away from 21, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 6:
When dividing 90 by 12, we get 7 with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 2981.7
If we take 84 away from 90, we end up with 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:
When dividing 60 by 12, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 2981.75
Deduct 60 from 60 and we're left 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.

Going ahead to step 8:
0 divided by 12 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2981.75
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.

Advancing to step 9:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 2981.75
If we subtract 0 from 0, 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.

The quotient of the division is 2981.75, and the remainder is 0.0.