8471511 ÷ 866 
The aim is to understand the frequency of 866 in 8471511.

Moving on to step 1:
866 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 866

Step 2:
The number 866 fits into 84 0 times, leaving a remainder of 84.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 84 to get 84.
Take the next digit (7) from the dividend and append it to 84, then repeat: 847 / 866

Let's proceed to step 3:
When dividing 847 by 866, we get 0 with a remainder of 847.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 847 leaves us with 847.
Include the next digit (1) from the dividend after 847, then repeat: 8471 / 866

On to step 4:
If we divide 8471 by 866, we get 9 and a remainder of 677.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtracting 7794 from 8471 leaves us with 677.
Take the next digit (5) from the dividend and append it to 677, then repeat: 6775 / 866

On to step 5:
If we divide 6775 by 866, we get 7 and a remainder of 713.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
If we take 6062 away from 6775, we end up with 713.
Grab the next digit (1) from the dividend, add it to 713, then carry on: 7131 / 866

Step 6:
The number 866 fits into 7131 8 times, leaving a remainder of 203.
Put 8 as the next digit of the answer. 
Result so far: 978.0
If we subtract 6928 from 7131, we get 203.
Bring next digit (1) of the dividend behind the 203 and repeat the process: 2031 / 866

On to step 7:
2031 divided by 866 is 2 with a remainder of 299.
Put 2 as the next digit of the answer. 
Result so far: 9782.0
The remainder is 299 after subtracting 1732 from 2031.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Step 8:
2990 divided by 866 is 3 with a remainder of 392.
Write down 3 as next digit of the result. 
Result so far: 9782.3
The remainder is 392 after subtracting 2598 from 2990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

On to step 9:
866 can be fit into 3920 4 times, resulting in a remainder of 456.
Use 4 as the next digit of our solution. 
Result so far: 9782.34
Subtracting 3464 from 3920 leaves us with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Going ahead to step 10:
4560 divided by 866 is 5 with a remainder of 230.
Write down 5 as next digit of the result. 
Result so far: 9782.345
If we take 4330 away from 4560, we end up with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 11:
2300 divided by 866 is 2 with a remainder of 568.
Write down 2 as next digit of the result. 
Result so far: 9782.3452
If we subtract 1732 from 2300, we get 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Step 12:
The number 866 fits into 5680 6 times, leaving a remainder of 484.
The number 6 becomes the next digit in our result. 
Result so far: 9782.34526
If we subtract 5196 from 5680, we get 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Advancing to step 13:
866 goes into 4840 5 times with a remainder of 510.
Record the quotient 5 as the next digit in the result. 
Result so far: 9782.345265
If we take 4330 away from 4840, we end up with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 14:
The number 866 fits into 5100 5 times, leaving a remainder of 770.
Put 5 as the next digit of the answer. 
Result so far: 9782.3452655
Subtract 4330 from 5100 to get 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

The quotient of the division is 9782.3452655, and the remainder is 7.7e-06.