We're dividing 352916 by 18 
The aim is to understand the frequency of 18 in 352916.

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
Subtract 0 from 3 to get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 18

Advancing to step 2:
18 can be fit into 35 1 times, resulting in a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 18 from 35 and we're left with 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 18

Step 3:
When dividing 172 by 18, we get 9 with a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 162 from 172 to get 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 18

Going ahead to step 4:
18 can be fit into 109 6 times, resulting in a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 196.0
If we take 108 away from 109, we end up with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 18

Moving on to step 5:
If we divide 11 by 18, we get 0 and a remainder of 11.
The next digit of our result is 0. 
Result so far: 1960.0
Subtract 0 from 11 to get 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 18

Moving on to step 6:
18 goes into 116 6 times with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 19606.0
Subtracting 108 from 116 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
18 goes into 80 4 times with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 19606.4
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
When dividing 80 by 18, we get 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 19606.44
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 19606.44 and a remainder of 0.008.