166188 divided by 81 
The aim is to understand the frequency of 81 in 166188.

Going ahead to step 1:
81 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 81

Moving on to step 2:
16 divided by 81 is 0 with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Bring next digit (6) of the dividend behind the 16 and repeat the process: 166 / 81

Let's proceed to step 3:
If we divide 166 by 81, we get 2 and a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 162 from 166 leaves us with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 81

Step 4:
41 divided by 81 is 0 with a remainder of 41.
Write down 0 as next digit of the result. 
Result so far: 20.0
If we subtract 0 from 41, we get 41.
Fetch the next digit (8) from the dividend, attach it to 41 and continue: 418 / 81

Advancing to step 5:
418 divided by 81 is 5 with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 205.0
The remainder is 13 after subtracting 405 from 418.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 81

Advancing to step 6:
If we divide 138 by 81, we get 1 and a remainder of 57.
The number 1 becomes the next digit in our result. 
Result so far: 2051.0
The remainder is 57 after subtracting 81 from 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 7:
81 can be fit into 570 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 2051.7
If we take 567 away from 570, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 8:
When dividing 30 by 81, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 2051.7
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 9:
When dividing 300 by 81, we get 3 with a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 2051.703
If we subtract 243 from 300, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 10:
81 can be fit into 570 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 2051.7037
Deduct 567 from 570 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 11:
30 divided by 81 is 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 2051.7037
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 12:
81 goes into 300 3 times with a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 2051.703703
If we take 243 away from 300, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 13:
The number 81 fits into 570 7 times, leaving a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 2051.7037037
Deduct 567 from 570 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 14:
81 goes into 30 0 times with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 2051.7037037
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 2051.7037037 with a balance of 3e-08.