We look at the division of 219678 by 81 
The aim is to understand the frequency of 81 in 219678.

Moving on to step 1:
2 divided by 81 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 81

Advancing to step 2:
If we divide 21 by 81, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 81

Going ahead to step 3:
81 can be fit into 219 2 times, resulting in a remainder of 57.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 162 from 219 and we're left with 57.
Fetch the next digit (6) from the dividend, attach it to 57 and continue: 576 / 81

Moving on to step 4:
If we divide 576 by 81, we get 7 and a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 27.0
The remainder is 9 after subtracting 567 from 576.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 81

Going ahead to step 5:
81 goes into 97 1 times with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 271.0
If we take 81 away from 97, we end up with 16.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 81

On to step 6:
If we divide 168 by 81, we get 2 and a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2712.0
Subtract 162 from 168 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.

Moving on to step 7:
The number 81 fits into 60 0 times, leaving a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 2712.0
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
81 can be fit into 600 7 times, resulting in a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 2712.07
Deduct 567 from 600 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 9:
The number 81 fits into 330 4 times, leaving a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 2712.074
If we take 324 away from 330, 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 10:
81 goes into 60 0 times with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 2712.074
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 11:
When dividing 600 by 81, we get 7 with a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 2712.07407
Deduct 567 from 600 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 12:
If we divide 330 by 81, we get 4 and a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 2712.074074
Deduct 324 from 330 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.

On to step 13:
81 goes into 60 0 times with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 2712.074074
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 14:
600 divided by 81 is 7 with a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 2712.07407407
Deduct 567 from 600 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

After the division, we end up with 2712.07407407 and a remainder of 3.3e-08.