Let's divide 81306369 by 866
The aim is to understand the frequency of 866 in 81306369.

Step 1:
When dividing 8 by 866, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 866

On to step 2:
When dividing 81 by 866, we get 0 with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Take the next digit (3) from the dividend and append it to 81, then repeat: 813 / 866

Advancing to step 3:
813 divided by 866 is 0 with a remainder of 813.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 813 to get 813.
Fetch the next digit (0) from the dividend, attach it to 813 and continue: 8130 / 866

Moving on to step 4:
When dividing 8130 by 866, we get 9 with a remainder of 336.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 7794 from 8130 leaves us with 336.
Grab the next digit (6) from the dividend, add it to 336, then carry on: 3366 / 866

Going ahead to step 5:
When dividing 3366 by 866, we get 3 with a remainder of 768.
Record the quotient 3 as the next digit in the result. 
Result so far: 93.0
The remainder is 768 after subtracting 2598 from 3366.
Grab the next digit (3) from the dividend, add it to 768, then carry on: 7683 / 866

Going ahead to step 6:
7683 divided by 866 is 8 with a remainder of 755.
Use 8 as the next digit of our solution. 
Result so far: 938.0
Subtracting 6928 from 7683 leaves us with 755.
Include the next digit (6) from the dividend after 755, then repeat: 7556 / 866

Let's proceed to step 7:
When dividing 7556 by 866, we get 8 with a remainder of 628.
Write down 8 as next digit of the result. 
Result so far: 9388.0
Subtracting 6928 from 7556 leaves us with 628.
Grab the next digit (9) from the dividend, add it to 628, then carry on: 6289 / 866

Going ahead to step 8:
866 goes into 6289 7 times with a remainder of 227.
The next digit of our result is 7. 
Result so far: 93887.0
Subtract 6062 from 6289 to get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

On to step 9:
When dividing 2270 by 866, we get 2 with a remainder of 538.
Put 2 as the next digit of the answer. 
Result so far: 93887.2
If we subtract 1732 from 2270, we get 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Let's proceed to step 10:
If we divide 5380 by 866, we get 6 and a remainder of 184.
The next digit of our result is 6. 
Result so far: 93887.26
The remainder is 184 after subtracting 5196 from 5380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Step 11:
The number 866 fits into 1840 2 times, leaving a remainder of 108.
The number 2 becomes the next digit in our result. 
Result so far: 93887.262
Deduct 1732 from 1840 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

On to step 12:
When dividing 1080 by 866, we get 1 with a remainder of 214.
Put 1 as the next digit of the answer. 
Result so far: 93887.2621
If we subtract 866 from 1080, we get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Let's proceed to step 13:
The number 866 fits into 2140 2 times, leaving a remainder of 408.
The next digit of our result is 2. 
Result so far: 93887.26212
The remainder is 408 after subtracting 1732 from 2140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Going ahead to step 14:
866 goes into 4080 4 times with a remainder of 616.
The number 4 becomes the next digit in our result. 
Result so far: 93887.262124
The remainder is 616 after subtracting 3464 from 4080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Let's proceed to step 15:
The number 866 fits into 6160 7 times, leaving a remainder of 98.
Put 7 as the next digit of the answer. 
Result so far: 93887.2621247
Deduct 6062 from 6160 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 16:
866 goes into 980 1 times with a remainder of 114.
Record the quotient 1 as the next digit in the result. 
Result so far: 93887.26212471
Subtract 866 from 980 to get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

In conclusion, the division gives 93887.26212471 with a balance of 1.14e-07.