Let's divide 462621 by 18
The aim is to understand the frequency of 18 in 462621.

Step 1:
18 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 18

Step 2:
18 goes into 46 2 times with a remainder of 10.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 36 from 46, we get 10.
Take the next digit (2) from the dividend and append it to 10, then repeat: 102 / 18

Advancing to step 3:
If we divide 102 by 18, we get 5 and a remainder of 12.
The next digit of our result is 5. 
Result so far: 25.0
Subtracting 90 from 102 leaves us with 12.
Fetch the next digit (6) from the dividend, attach it to 12 and continue: 126 / 18

Let's proceed to step 4:
126 divided by 18 is 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 257.0
If we subtract 126 from 126, we get 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 18

Moving on to step 5:
18 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 2570.0
If we subtract 0 from 2, we get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 18

Advancing to step 6:
When dividing 21 by 18, we get 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 25701.0
If we take 18 away from 21, 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 18 fits into 30 1 times, leaving a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 25701.1
Subtracting 18 from 30 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.

Advancing to step 8:
120 divided by 18 is 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 25701.16
Deduct 108 from 120 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.

Advancing to step 9:
When dividing 120 by 18, we get 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 25701.166
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.

Our division results in 25701.166 with a remaining 0.0012.