We're dividing 928521 by 12 
The aim is to understand the frequency of 12 in 928521.

Step 1:
When dividing 9 by 12, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 12

Step 2:
The number 12 fits into 92 7 times, leaving a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 84 from 92, we get 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 12

Going ahead to step 3:
12 can be fit into 88 7 times, resulting in a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 77.0
If we subtract 84 from 88, we get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 12

Step 4:
When dividing 45 by 12, we get 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 773.0
Deduct 36 from 45 and we're left with 9.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 12

Step 5:
When dividing 92 by 12, we get 7 with a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 7737.0
If we subtract 84 from 92, we get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 12

Advancing to step 6:
12 goes into 81 6 times with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 77376.0
Subtracting 72 from 81 leaves us 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.

Step 7:
90 divided by 12 is 7 with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 77376.7
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.

Step 8:
The number 12 fits into 60 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 77376.75
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.

Step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 77376.75
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.

Let's proceed to step 10:
0 divided by 12 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 77376.75
If we take 0 away from 0, we end up 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.

The final result is 77376.75 with a remainder of 0.0.