We're dividing 83964365 by 866 
The aim is to understand the frequency of 866 in 83964365.

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
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 866

Step 2:
When dividing 83 by 866, we get 0 with a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Fetch the next digit (9) from the dividend, attach it to 83 and continue: 839 / 866

On to step 3:
If we divide 839 by 866, we get 0 and a remainder of 839.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 839 after subtracting 0 from 839.
Grab the next digit (6) from the dividend, add it to 839, then carry on: 8396 / 866

Going ahead to step 4:
The number 866 fits into 8396 9 times, leaving a remainder of 602.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 7794 from 8396 and we're left with 602.
Grab the next digit (4) from the dividend, add it to 602, then carry on: 6024 / 866

Moving on to step 5:
866 goes into 6024 6 times with a remainder of 828.
Write down 6 as next digit of the result. 
Result so far: 96.0
If we subtract 5196 from 6024, we get 828.
Append the next digit (3) from the dividend to 828 and continue with: 8283 / 866

Let's proceed to step 6:
866 goes into 8283 9 times with a remainder of 489.
Write down 9 as next digit of the result. 
Result so far: 969.0
If we subtract 7794 from 8283, we get 489.
Take the next digit (6) from the dividend and append it to 489, then repeat: 4896 / 866

Advancing to step 7:
The number 866 fits into 4896 5 times, leaving a remainder of 566.
Use 5 as the next digit of our solution. 
Result so far: 9695.0
Subtract 4330 from 4896 to get 566.
Append the next digit (5) from the dividend to 566 and continue with: 5665 / 866

Step 8:
The number 866 fits into 5665 6 times, leaving a remainder of 469.
The next digit of our result is 6. 
Result so far: 96956.0
If we take 5196 away from 5665, we end up with 469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4690, and continue the process.

Advancing to step 9:
866 goes into 4690 5 times with a remainder of 360.
The number 5 becomes the next digit in our result. 
Result so far: 96956.5
Deduct 4330 from 4690 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 10:
If we divide 3600 by 866, we get 4 and a remainder of 136.
The next digit of our result is 4. 
Result so far: 96956.54
If we subtract 3464 from 3600, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 11:
1360 divided by 866 is 1 with a remainder of 494.
The next digit of our result is 1. 
Result so far: 96956.541
Subtract 866 from 1360 to get 494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

On to step 12:
The number 866 fits into 4940 5 times, leaving a remainder of 610.
Write down 5 as next digit of the result. 
Result so far: 96956.5415
Subtract 4330 from 4940 to get 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Let's proceed to step 13:
6100 divided by 866 is 7 with a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 96956.54157
If we take 6062 away from 6100, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 14:
866 goes into 380 0 times with a remainder of 380.
Use 0 as the next digit of our solution. 
Result so far: 96956.54157
Subtracting 0 from 380 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Advancing to step 15:
866 goes into 3800 4 times with a remainder of 336.
The next digit of our result is 4. 
Result so far: 96956.5415704
If we subtract 3464 from 3800, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

On to step 16:
866 goes into 3360 3 times with a remainder of 762.
Put 3 as the next digit of the answer. 
Result so far: 96956.54157043
If we subtract 2598 from 3360, we get 762.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7620, and continue the process.

The quotient of the division is 96956.54157043, and the remainder is 7.62e-07.