86156511 divided by 18 
The aim is to understand the frequency of 18 in 86156511.

Going ahead to step 1:
When dividing 8 by 18, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 18

Let's proceed to step 2:
If we divide 86 by 18, we get 4 and a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 72 from 86 and we're left with 14.
Fetch the next digit (1) from the dividend, attach it to 14 and continue: 141 / 18

Step 3:
If we divide 141 by 18, we get 7 and a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 47.0
If we subtract 126 from 141, we get 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 18

Step 4:
The number 18 fits into 155 8 times, leaving a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 478.0
If we take 144 away from 155, we end up with 11.
Fetch the next digit (6) from the dividend, attach it to 11 and continue: 116 / 18

Advancing to step 5:
18 can be fit into 116 6 times, resulting in a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 4786.0
Deduct 108 from 116 and we're left with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 18

Advancing to step 6:
The number 18 fits into 85 4 times, leaving a remainder of 13.
Write down 4 as next digit of the result. 
Result so far: 47864.0
If we take 72 away from 85, we end up with 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 18

Going ahead to step 7:
131 divided by 18 is 7 with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 478647.0
Subtract 126 from 131 to get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 18

Step 8:
When dividing 51 by 18, we get 2 with a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 4786472.0
If we subtract 36 from 51, we get 15.
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 9:
18 goes into 150 8 times with a remainder of 6.
The next digit of our result is 8. 
Result so far: 4786472.8
If we subtract 144 from 150, 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.

Let's proceed to step 10:
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: 4786472.83
If we take 54 away from 60, we end up 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.

Moving on to step 11:
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: 4786472.833
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 4786472.833, with a leftover of 0.0006.