178501 ÷ 81 
The aim is to understand the frequency of 81 in 178501.

On to step 1:
1 divided by 81 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 81

Going ahead to step 2:
The number 81 fits into 17 0 times, leaving a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 17 leaves us with 17.
Include the next digit (8) from the dividend after 17, then repeat: 178 / 81

Moving on to step 3:
81 goes into 178 2 times with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 162 away from 178, we end up with 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 81

Going ahead to step 4:
81 goes into 165 2 times with a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 22.0
If we subtract 162 from 165, we get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 81

On to step 5:
30 divided by 81 is 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 220.0
Subtracting 0 from 30 leaves us with 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 81

Let's proceed to step 6:
If we divide 301 by 81, we get 3 and a remainder of 58.
Write down 3 as next digit of the result. 
Result so far: 2203.0
If we subtract 243 from 301, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 7:
81 goes into 580 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 2203.7
The remainder is 13 after subtracting 567 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 8:
If we divide 130 by 81, we get 1 and a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 2203.71
Subtracting 81 from 130 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 9:
81 goes into 490 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 2203.716
If we take 486 away from 490, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
When dividing 40 by 81, we get 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 2203.716
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
The number 81 fits into 400 4 times, leaving a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 2203.71604
Subtracting 324 from 400 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 12:
When dividing 760 by 81, we get 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 2203.716049
The remainder is 31 after subtracting 729 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 13:
310 divided by 81 is 3 with a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 2203.7160493
Subtract 243 from 310 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 14:
The number 81 fits into 670 8 times, leaving a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 2203.71604938
If we subtract 648 from 670, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final outcome is 2203.71604938, with a leftover of 2.2e-08.