We look at the division of 591002 by 18 
The aim is to understand the frequency of 18 in 591002.

Let's proceed to step 1:
18 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 18

Moving on to step 2:
If we divide 59 by 18, we get 3 and a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 5 after subtracting 54 from 59.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 18

Let's proceed to step 3:
When dividing 51 by 18, we get 2 with a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 32.0
If we take 36 away from 51, we end up with 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 18

Step 4:
18 can be fit into 150 8 times, resulting in a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 328.0
Subtract 144 from 150 to get 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 18

Moving on to step 5:
When dividing 60 by 18, we get 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 3283.0
If we subtract 54 from 60, we get 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 18

Going ahead to step 6:
62 divided by 18 is 3 with a remainder of 8.
The next digit of our result is 3. 
Result so far: 32833.0
Subtracting 54 from 62 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.

Going ahead to step 7:
When dividing 80 by 18, we get 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 32833.4
Subtract 72 from 80 to 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.

Step 8:
18 can be fit into 80 4 times, resulting in a remainder of 8.
The next digit of our result is 4. 
Result so far: 32833.44
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 32833.44, with a leftover of 0.008.