392601 divided by 18 
The aim is to understand the frequency of 18 in 392601.

Moving on to step 1:
When dividing 3 by 18, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 18

Going ahead to step 2:
39 divided by 18 is 2 with a remainder of 3.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 3 after subtracting 36 from 39.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 18

Let's proceed to step 3:
The number 18 fits into 32 1 times, leaving a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 21.0
Deduct 18 from 32 and we're left with 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 18

Let's proceed to step 4:
The number 18 fits into 146 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 218.0
If we subtract 144 from 146, we get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 18

Going ahead to step 5:
When dividing 20 by 18, we get 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 2181.0
Subtracting 18 from 20 leaves us with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 18

Step 6:
18 goes into 21 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 21811.0
Subtract 18 from 21 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
The number 18 fits into 30 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 21811.1
Deduct 18 from 30 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
18 goes into 120 6 times with a remainder of 12.
The next digit of our result is 6. 
Result so far: 21811.16
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
The number 18 fits into 120 6 times, leaving a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 21811.166
Subtracting 108 from 120 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 21811.166 and a remainder of 0.0012.