552777 ÷ 18 
The aim is to understand the frequency of 18 in 552777.

Step 1:
18 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 18

Going ahead to step 2:
18 can be fit into 55 3 times, resulting in a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 54 from 55, we get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 18

Advancing to step 3:
The number 18 fits into 12 0 times, leaving a remainder of 12.
The next digit of our result is 0. 
Result so far: 30.0
The remainder is 12 after subtracting 0 from 12.
Take the next digit (7) from the dividend and append it to 12, then repeat: 127 / 18

Step 4:
The number 18 fits into 127 7 times, leaving a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 307.0
The remainder is 1 after subtracting 126 from 127.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 18

Going ahead to step 5:
If we divide 17 by 18, we get 0 and a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 3070.0
If we subtract 0 from 17, we get 17.
Include the next digit (7) from the dividend after 17, then repeat: 177 / 18

Moving on to step 6:
18 can be fit into 177 9 times, resulting in a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 30709.0
The remainder is 15 after subtracting 162 from 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
18 goes into 150 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 30709.8
The remainder is 6 after subtracting 144 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
18 can be fit into 60 3 times, resulting in a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 30709.83
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.

Step 9:
60 divided by 18 is 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 30709.833
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 30709.833, with a leftover of 0.0006.