We look at the division of 133875 by 81 
The aim is to understand the frequency of 81 in 133875.

Let's proceed to step 1:
If we divide 1 by 81, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 81

On to step 2:
81 can be fit into 13 0 times, resulting in a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Append the next digit (3) from the dividend to 13 and continue with: 133 / 81

Going ahead to step 3:
81 can be fit into 133 1 times, resulting in a remainder of 52.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 81 from 133, we get 52.
Grab the next digit (8) from the dividend, add it to 52, then carry on: 528 / 81

Let's proceed to step 4:
81 can be fit into 528 6 times, resulting in a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtracting 486 from 528 leaves us with 42.
Append the next digit (7) from the dividend to 42 and continue with: 427 / 81

Moving on to step 5:
When dividing 427 by 81, we get 5 with a remainder of 22.
Put 5 as the next digit of the answer. 
Result so far: 165.0
Deduct 405 from 427 and we're left with 22.
Take the next digit (5) from the dividend and append it to 22, then repeat: 225 / 81

Advancing to step 6:
The number 81 fits into 225 2 times, leaving a remainder of 63.
Record the quotient 2 as the next digit in the result. 
Result so far: 1652.0
The remainder is 63 after subtracting 162 from 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 7:
81 can be fit into 630 7 times, resulting in a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 1652.7
Subtracting 567 from 630 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 8:
630 divided by 81 is 7 with a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 1652.77
Deduct 567 from 630 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

In conclusion, the division gives 1652.77 with a balance of 0.063.