We're dividing 1628932 by 18 
The aim is to understand the frequency of 18 in 1628932.

On to step 1:
When dividing 1 by 18, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 18

On to step 2:
18 can be fit into 16 0 times, resulting in a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Fetch the next digit (2) from the dividend, attach it to 16 and continue: 162 / 18

Advancing to step 3:
The number 18 fits into 162 9 times, leaving a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 0 after subtracting 162 from 162.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 18

Step 4:
18 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 18

Advancing to step 5:
If we divide 89 by 18, we get 4 and a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 904.0
The remainder is 17 after subtracting 72 from 89.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 18

Step 6:
When dividing 173 by 18, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 9049.0
Subtracting 162 from 173 leaves us with 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 18

On to step 7:
18 goes into 112 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 90496.0
Subtracting 108 from 112 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
The number 18 fits into 40 2 times, leaving a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 90496.2
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
If we divide 40 by 18, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 90496.22
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 90496.22, with a leftover of 0.004.