Let's divide 111901 by 18
The aim is to understand the frequency of 18 in 111901.

Going ahead to step 1:
18 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 18

Let's proceed to step 2:
11 divided by 18 is 0 with a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 11 after subtracting 0 from 11.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 18

Step 3:
If we divide 111 by 18, we get 6 and a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 108 from 111 to get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 18

Going ahead to step 4:
18 can be fit into 39 2 times, resulting in a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 62.0
Subtracting 36 from 39 leaves us with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 18

On to step 5:
18 goes into 30 1 times with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 621.0
Subtracting 18 from 30 leaves us with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 18

On to step 6:
The number 18 fits into 121 6 times, leaving a remainder of 13.
Use 6 as the next digit of our solution. 
Result so far: 6216.0
Subtracting 108 from 121 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
18 goes into 130 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 6216.7
Subtract 126 from 130 to 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 8:
18 can be fit into 40 2 times, resulting in a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 6216.72
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.

Going ahead to step 9:
18 can be fit into 40 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 6216.722
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.

After the division, we end up with 6216.722 and a remainder of 0.0004.