We look at the division of 29118 by 18 
The aim is to understand the frequency of 18 in 29118.

On to step 1:
When dividing 2 by 18, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 18

Let's proceed to step 2:
18 goes into 29 1 times with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 18 from 29 and we're left with 11.
Include the next digit (1) from the dividend after 11, then repeat: 111 / 18

Advancing to step 3:
If we divide 111 by 18, we get 6 and a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 16.0
Subtract 108 from 111 to get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 18

On to step 4:
The number 18 fits into 31 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 161.0
If we take 18 away from 31, we end up with 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 18

Let's proceed to step 5:
The number 18 fits into 138 7 times, leaving a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 1617.0
Deduct 126 from 138 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 6:
If we divide 120 by 18, we get 6 and a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 1617.6
Subtracting 108 from 120 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
When dividing 120 by 18, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 1617.66
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 1617.66 with a remaining 0.012.