We divide 805833 by 81
The aim is to understand the frequency of 81 in 805833.

On to step 1:
81 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 81

Moving on to step 2:
When dividing 80 by 81, we get 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Bring next digit (5) of the dividend behind the 80 and repeat the process: 805 / 81

Advancing to step 3:
805 divided by 81 is 9 with a remainder of 76.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 76 after subtracting 729 from 805.
Include the next digit (8) from the dividend after 76, then repeat: 768 / 81

Moving on to step 4:
768 divided by 81 is 9 with a remainder of 39.
Record the quotient 9 as the next digit in the result. 
Result so far: 99.0
Deduct 729 from 768 and we're left with 39.
Append the next digit (3) from the dividend to 39 and continue with: 393 / 81

Moving on to step 5:
81 goes into 393 4 times with a remainder of 69.
The next digit of our result is 4. 
Result so far: 994.0
Deduct 324 from 393 and we're left with 69.
Fetch the next digit (3) from the dividend, attach it to 69 and continue: 693 / 81

Let's proceed to step 6:
When dividing 693 by 81, we get 8 with a remainder of 45.
Record the quotient 8 as the next digit in the result. 
Result so far: 9948.0
Deduct 648 from 693 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 7:
The number 81 fits into 450 5 times, leaving a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 9948.5
The remainder is 45 after subtracting 405 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 8:
81 goes into 450 5 times with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 9948.55
Subtracting 405 from 450 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Our division results in 9948.55 with a remaining 0.045.