We're dividing 577815 by 12 
The aim is to understand the frequency of 12 in 577815.

On to step 1:
When dividing 5 by 12, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 12

Let's proceed to step 2:
If we divide 57 by 12, we get 4 and a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 48 away from 57, we end up with 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 12

Advancing to step 3:
97 divided by 12 is 8 with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 48.0
Subtracting 96 from 97 leaves us with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 12

Moving on to step 4:
18 divided by 12 is 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 481.0
If we subtract 12 from 18, we get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 12

Moving on to step 5:
12 can be fit into 61 5 times, resulting in a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 4815.0
Subtract 60 from 61 to get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 12

Advancing to step 6:
The number 12 fits into 15 1 times, leaving a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 48151.0
If we take 12 away from 15, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
The number 12 fits into 30 2 times, leaving a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 48151.2
Subtract 24 from 30 to 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.

Going ahead to step 8:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 48151.25
Subtract 60 from 60 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.

Moving on to step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 48151.25
Deduct 0 from 0 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.

Advancing to step 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 48151.25
Deduct 0 from 0 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.

Our division results in 48151.25 with a remaining 0.0.