Let's divide 260191 by 18
The aim is to understand the frequency of 18 in 260191.

Going ahead to step 1:
When dividing 2 by 18, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 18

On to step 2:
26 divided by 18 is 1 with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 18 from 26 leaves us with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 18

Step 3:
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: 14.0
Subtract 72 from 80 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 18

Let's proceed to step 4:
The number 18 fits into 81 4 times, leaving a remainder of 9.
The next digit of our result is 4. 
Result so far: 144.0
Subtracting 72 from 81 leaves us with 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 18

Let's proceed to step 5:
18 can be fit into 99 5 times, resulting in a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 1445.0
Subtracting 90 from 99 leaves us with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 18

On to step 6:
If we divide 91 by 18, we get 5 and a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 14455.0
The remainder is 1 after subtracting 90 from 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
18 goes into 10 0 times with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 14455.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
If we divide 100 by 18, we get 5 and a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 14455.05
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
18 can be fit into 100 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 14455.055
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 14455.055 with a remainder of 0.001.