We're dividing 667175 by 81 
The aim is to understand the frequency of 81 in 667175.

On to step 1:
81 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 81

Going ahead to step 2:
The number 81 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (7) from the dividend and append it to 66, then repeat: 667 / 81

On to step 3:
The number 81 fits into 667 8 times, leaving a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 648 from 667 to get 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 81

Moving on to step 4:
If we divide 191 by 81, we get 2 and a remainder of 29.
Put 2 as the next digit of the answer. 
Result so far: 82.0
Subtract 162 from 191 to get 29.
Take the next digit (7) from the dividend and append it to 29, then repeat: 297 / 81

Moving on to step 5:
297 divided by 81 is 3 with a remainder of 54.
Write down 3 as next digit of the result. 
Result so far: 823.0
The remainder is 54 after subtracting 243 from 297.
Fetch the next digit (5) from the dividend, attach it to 54 and continue: 545 / 81

On to step 6:
81 goes into 545 6 times with a remainder of 59.
Use 6 as the next digit of our solution. 
Result so far: 8236.0
If we subtract 486 from 545, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 7:
If we divide 590 by 81, we get 7 and a remainder of 23.
The next digit of our result is 7. 
Result so far: 8236.7
The remainder is 23 after subtracting 567 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 8:
230 divided by 81 is 2 with a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 8236.72
Subtracting 162 from 230 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 9:
81 can be fit into 680 8 times, resulting in a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 8236.728
Subtracting 648 from 680 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 10:
81 can be fit into 320 3 times, resulting in a remainder of 77.
Write down 3 as next digit of the result. 
Result so far: 8236.7283
Subtracting 243 from 320 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 11:
81 goes into 770 9 times with a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 8236.72839
Subtracting 729 from 770 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 12:
81 goes into 410 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 8236.728395
Deduct 405 from 410 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 13:
50 divided by 81 is 0 with a remainder of 50.
The next digit of our result is 0. 
Result so far: 8236.728395
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 14:
81 goes into 500 6 times with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 8236.72839506
Deduct 486 from 500 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 8236.72839506 with a remaining 1.4e-08.