651543 ÷ 18 
The aim is to understand the frequency of 18 in 651543.

Going ahead to step 1:
18 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 18

On to step 2:
The number 18 fits into 65 3 times, leaving a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 54 away from 65, we end up with 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 18

Step 3:
18 can be fit into 111 6 times, resulting in a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 36.0
Subtracting 108 from 111 leaves us with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 18

Advancing to step 4:
When dividing 35 by 18, we get 1 with a remainder of 17.
Use 1 as the next digit of our solution. 
Result so far: 361.0
Subtract 18 from 35 to get 17.
Fetch the next digit (4) from the dividend, attach it to 17 and continue: 174 / 18

Step 5:
If we divide 174 by 18, we get 9 and a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 3619.0
Deduct 162 from 174 and we're left with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 18

Advancing to step 6:
18 can be fit into 123 6 times, resulting in a remainder of 15.
The next digit of our result is 6. 
Result so far: 36196.0
Deduct 108 from 123 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
When dividing 150 by 18, we get 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 36196.8
Subtracting 144 from 150 leaves us 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 8:
If we divide 60 by 18, we get 3 and a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 36196.83
Subtract 54 from 60 to 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.

On to step 9:
18 goes into 60 3 times with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 36196.833
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.

The final outcome is 36196.833, with a leftover of 0.0006.