Let's divide 71228598 by 18
The aim is to understand the frequency of 18 in 71228598.

Going ahead to step 1:
7 divided by 18 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 18

Let's proceed to step 2:
When dividing 71 by 18, we get 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 17 after subtracting 54 from 71.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 18

On to step 3:
172 divided by 18 is 9 with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtracting 162 from 172 leaves us with 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 18

Going ahead to step 4:
18 goes into 102 5 times with a remainder of 12.
The next digit of our result is 5. 
Result so far: 395.0
If we take 90 away from 102, we end up with 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 18

On to step 5:
When dividing 128 by 18, we get 7 with a remainder of 2.
The next digit of our result is 7. 
Result so far: 3957.0
Subtracting 126 from 128 leaves us with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 18

Advancing to step 6:
The number 18 fits into 25 1 times, leaving a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 39571.0
If we subtract 18 from 25, we get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 18

On to step 7:
18 can be fit into 79 4 times, resulting in a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 395714.0
If we subtract 72 from 79, we get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 18

Going ahead to step 8:
18 can be fit into 78 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 3957144.0
If we subtract 72 from 78, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 9:
If we divide 60 by 18, we get 3 and a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 3957144.3
Deduct 54 from 60 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 10:
When dividing 60 by 18, we get 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3957144.33
Deduct 54 from 60 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 3957144.33 with a remaining 0.006.