We divide 554891 by 18
The aim is to understand the frequency of 18 in 554891.

Step 1:
The number 18 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 18

Advancing to step 2:
When dividing 55 by 18, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 54 away from 55, we end up with 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 18

Advancing to step 3:
If we divide 14 by 18, we get 0 and a remainder of 14.
The next digit of our result is 0. 
Result so far: 30.0
Deduct 0 from 14 and we're left with 14.
Grab the next digit (8) from the dividend, add it to 14, then carry on: 148 / 18

On to step 4:
When dividing 148 by 18, we get 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 308.0
Deduct 144 from 148 and we're left with 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 18

Step 5:
When dividing 49 by 18, we get 2 with a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 3082.0
The remainder is 13 after subtracting 36 from 49.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 18

Step 6:
The number 18 fits into 131 7 times, leaving a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 30827.0
Subtract 126 from 131 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
18 can be fit into 50 2 times, resulting in a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 30827.2
The remainder is 14 after subtracting 36 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 8:
18 goes into 140 7 times with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 30827.27
If we subtract 126 from 140, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 9:
When dividing 140 by 18, we get 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 30827.277
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 30827.277, with a leftover of 0.0014.