693086 ÷ 81 
The aim is to understand the frequency of 81 in 693086.

Step 1:
81 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 81

Step 2:
The number 81 fits into 69 0 times, leaving a remainder of 69.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 69, we end up with 69.
Fetch the next digit (3) from the dividend, attach it to 69 and continue: 693 / 81

Step 3:
81 goes into 693 8 times with a remainder of 45.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 648 from 693, we get 45.
Take the next digit (0) from the dividend and append it to 45, then repeat: 450 / 81

Going ahead to step 4:
The number 81 fits into 450 5 times, leaving a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
Subtracting 405 from 450 leaves us with 45.
Fetch the next digit (8) from the dividend, attach it to 45 and continue: 458 / 81

On to step 5:
458 divided by 81 is 5 with a remainder of 53.
The number 5 becomes the next digit in our result. 
Result so far: 855.0
The remainder is 53 after subtracting 405 from 458.
Bring next digit (6) of the dividend behind the 53 and repeat the process: 536 / 81

Advancing to step 6:
81 can be fit into 536 6 times, resulting in a remainder of 50.
Use 6 as the next digit of our solution. 
Result so far: 8556.0
Subtracting 486 from 536 leaves us 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.

Going ahead to step 7:
81 can be fit into 500 6 times, resulting in a remainder of 14.
The next digit of our result is 6. 
Result so far: 8556.6
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.

Moving on to step 8:
When dividing 140 by 81, we get 1 with a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 8556.61
Subtracting 81 from 140 leaves us with 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 9:
The number 81 fits into 590 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 8556.617
Deduct 567 from 590 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 10:
If we divide 230 by 81, we get 2 and a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 8556.6172
Subtract 162 from 230 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 11:
81 goes into 680 8 times with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 8556.61728
Deduct 648 from 680 and we're left 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.

Going ahead to step 12:
The number 81 fits into 320 3 times, leaving a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 8556.617283
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.

Moving on to step 13:
81 goes into 770 9 times with a remainder of 41.
Record the quotient 9 as the next digit in the result. 
Result so far: 8556.6172839
The remainder is 41 after subtracting 729 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 14:
If we divide 410 by 81, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 8556.61728395
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.

The final outcome is 8556.61728395, with a leftover of 5e-09.