We're dividing 66995506 by 863 
The aim is to understand the frequency of 863 in 66995506.

On to step 1:
863 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
Deduct 0 from 6 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 863

Going ahead to step 2:
863 goes into 66 0 times with a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 863

Let's proceed to step 3:
669 divided by 863 is 0 with a remainder of 669.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 669 and we're left with 669.
Append the next digit (9) from the dividend to 669 and continue with: 6699 / 863

Step 4:
863 can be fit into 6699 7 times, resulting in a remainder of 658.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 6041 from 6699 to get 658.
Bring next digit (5) of the dividend behind the 658 and repeat the process: 6585 / 863

Step 5:
863 goes into 6585 7 times with a remainder of 544.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Deduct 6041 from 6585 and we're left with 544.
Grab the next digit (5) from the dividend, add it to 544, then carry on: 5445 / 863

Advancing to step 6:
5445 divided by 863 is 6 with a remainder of 267.
The next digit of our result is 6. 
Result so far: 776.0
If we subtract 5178 from 5445, we get 267.
Fetch the next digit (0) from the dividend, attach it to 267 and continue: 2670 / 863

Moving on to step 7:
863 can be fit into 2670 3 times, resulting in a remainder of 81.
The number 3 becomes the next digit in our result. 
Result so far: 7763.0
Subtract 2589 from 2670 to get 81.
Take the next digit (6) from the dividend and append it to 81, then repeat: 816 / 863

Advancing to step 8:
863 goes into 816 0 times with a remainder of 816.
The number 0 becomes the next digit in our result. 
Result so far: 77630.0
Subtracting 0 from 816 leaves us with 816.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8160, and continue the process.

Step 9:
When dividing 8160 by 863, we get 9 with a remainder of 393.
Put 9 as the next digit of the answer. 
Result so far: 77630.9
Deduct 7767 from 8160 and we're left with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Moving on to step 10:
When dividing 3930 by 863, we get 4 with a remainder of 478.
Use 4 as the next digit of our solution. 
Result so far: 77630.94
Deduct 3452 from 3930 and we're left with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Going ahead to step 11:
863 can be fit into 4780 5 times, resulting in a remainder of 465.
Write down 5 as next digit of the result. 
Result so far: 77630.945
If we take 4315 away from 4780, we end up with 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Moving on to step 12:
863 goes into 4650 5 times with a remainder of 335.
The number 5 becomes the next digit in our result. 
Result so far: 77630.9455
Deduct 4315 from 4650 and we're left with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

After the division, we end up with 77630.9455 and a remainder of 0.00335.