We're dividing 36631130 by 866 
The aim is to understand the frequency of 866 in 36631130.

Advancing to step 1:
When dividing 3 by 866, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 866

Let's proceed to step 2:
The number 866 fits into 36 0 times, leaving a remainder of 36.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 36, we end up with 36.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 866

On to step 3:
The number 866 fits into 366 0 times, leaving a remainder of 366.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 366 after subtracting 0 from 366.
Append the next digit (3) from the dividend to 366 and continue with: 3663 / 866

Going ahead to step 4:
The number 866 fits into 3663 4 times, leaving a remainder of 199.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 3464 from 3663, we get 199.
Fetch the next digit (1) from the dividend, attach it to 199 and continue: 1991 / 866

On to step 5:
The number 866 fits into 1991 2 times, leaving a remainder of 259.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we subtract 1732 from 1991, we get 259.
Bring next digit (1) of the dividend behind the 259 and repeat the process: 2591 / 866

Moving on to step 6:
If we divide 2591 by 866, we get 2 and a remainder of 859.
Record the quotient 2 as the next digit in the result. 
Result so far: 422.0
If we subtract 1732 from 2591, we get 859.
Take the next digit (3) from the dividend and append it to 859, then repeat: 8593 / 866

Step 7:
866 goes into 8593 9 times with a remainder of 799.
Record the quotient 9 as the next digit in the result. 
Result so far: 4229.0
Subtracting 7794 from 8593 leaves us with 799.
Include the next digit (0) from the dividend after 799, then repeat: 7990 / 866

Advancing to step 8:
866 can be fit into 7990 9 times, resulting in a remainder of 196.
The next digit of our result is 9. 
Result so far: 42299.0
Subtract 7794 from 7990 to get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Let's proceed to step 9:
The number 866 fits into 1960 2 times, leaving a remainder of 228.
Record the quotient 2 as the next digit in the result. 
Result so far: 42299.2
If we subtract 1732 from 1960, we get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 10:
866 can be fit into 2280 2 times, resulting in a remainder of 548.
Write down 2 as next digit of the result. 
Result so far: 42299.22
Deduct 1732 from 2280 and we're left with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Our division results in 42299.22 with a remaining 0.548.