812018 ÷ 84 
The aim is to understand the frequency of 84 in 812018.

On to step 1:
8 divided by 84 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 84

Let's proceed to step 2:
If we divide 81 by 84, we get 0 and a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Bring next digit (2) of the dividend behind the 81 and repeat the process: 812 / 84

Going ahead to step 3:
When dividing 812 by 84, we get 9 with a remainder of 56.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 756 from 812 leaves us with 56.
Take the next digit (0) from the dividend and append it to 56, then repeat: 560 / 84

Let's proceed to step 4:
If we divide 560 by 84, we get 6 and a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 96.0
If we subtract 504 from 560, we get 56.
Append the next digit (1) from the dividend to 56 and continue with: 561 / 84

On to step 5:
If we divide 561 by 84, we get 6 and a remainder of 57.
The next digit of our result is 6. 
Result so far: 966.0
If we subtract 504 from 561, we get 57.
Grab the next digit (8) from the dividend, add it to 57, then carry on: 578 / 84

Let's proceed to step 6:
84 goes into 578 6 times with a remainder of 74.
The number 6 becomes the next digit in our result. 
Result so far: 9666.0
Deduct 504 from 578 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 7:
The number 84 fits into 740 8 times, leaving a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 9666.8
Subtract 672 from 740 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 8:
84 goes into 680 8 times with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 9666.88
If we subtract 672 from 680, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 9666.88 with a remainder of 0.008.