We look at the division of 286937 by 81 
The aim is to understand the frequency of 81 in 286937.

Moving on to step 1:
When dividing 2 by 81, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 81

Step 2:
28 divided by 81 is 0 with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 81

Let's proceed to step 3:
The number 81 fits into 286 3 times, leaving a remainder of 43.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 243 from 286 and we're left with 43.
Include the next digit (9) from the dividend after 43, then repeat: 439 / 81

Moving on to step 4:
81 goes into 439 5 times with a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 35.0
Deduct 405 from 439 and we're left with 34.
Fetch the next digit (3) from the dividend, attach it to 34 and continue: 343 / 81

Step 5:
81 can be fit into 343 4 times, resulting in a remainder of 19.
The number 4 becomes the next digit in our result. 
Result so far: 354.0
Subtract 324 from 343 to get 19.
Bring next digit (7) of the dividend behind the 19 and repeat the process: 197 / 81

Let's proceed to step 6:
The number 81 fits into 197 2 times, leaving a remainder of 35.
Put 2 as the next digit of the answer. 
Result so far: 3542.0
If we subtract 162 from 197, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 7:
350 divided by 81 is 4 with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 3542.4
If we subtract 324 from 350, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 8:
When dividing 260 by 81, we get 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3542.43
Subtracting 243 from 260 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 9:
81 goes into 170 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 3542.432
Subtracting 162 from 170 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
The number 81 fits into 80 0 times, leaving a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 3542.432
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 11:
81 can be fit into 800 9 times, resulting in a remainder of 71.
The number 9 becomes the next digit in our result. 
Result so far: 3542.43209
If we subtract 729 from 800, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 12:
81 can be fit into 710 8 times, resulting in a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 3542.432098
The remainder is 62 after subtracting 648 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 13:
When dividing 620 by 81, we get 7 with a remainder of 53.
Put 7 as the next digit of the answer. 
Result so far: 3542.4320987
If we take 567 away from 620, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Let's proceed to step 14:
When dividing 530 by 81, we get 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 3542.43209876
The remainder is 44 after subtracting 486 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

In conclusion, the division gives 3542.43209876 with a balance of 4.4e-08.