We're dividing 86691575 by 899 
The aim is to understand the frequency of 899 in 86691575.

On to step 1:
If we divide 8 by 899, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 899

On to step 2:
If we divide 86 by 899, we get 0 and a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Append the next digit (6) from the dividend to 86 and continue with: 866 / 899

On to step 3:
899 can be fit into 866 0 times, resulting in a remainder of 866.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 866 leaves us with 866.
Append the next digit (9) from the dividend to 866 and continue with: 8669 / 899

Advancing to step 4:
899 can be fit into 8669 9 times, resulting in a remainder of 578.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 8091 from 8669 and we're left with 578.
Bring next digit (1) of the dividend behind the 578 and repeat the process: 5781 / 899

Let's proceed to step 5:
The number 899 fits into 5781 6 times, leaving a remainder of 387.
Record the quotient 6 as the next digit in the result. 
Result so far: 96.0
Subtracting 5394 from 5781 leaves us with 387.
Fetch the next digit (5) from the dividend, attach it to 387 and continue: 3875 / 899

Going ahead to step 6:
899 can be fit into 3875 4 times, resulting in a remainder of 279.
The number 4 becomes the next digit in our result. 
Result so far: 964.0
Subtracting 3596 from 3875 leaves us with 279.
Include the next digit (7) from the dividend after 279, then repeat: 2797 / 899

Step 7:
If we divide 2797 by 899, we get 3 and a remainder of 100.
Write down 3 as next digit of the result. 
Result so far: 9643.0
Subtracting 2697 from 2797 leaves us with 100.
Fetch the next digit (5) from the dividend, attach it to 100 and continue: 1005 / 899

Step 8:
When dividing 1005 by 899, we get 1 with a remainder of 106.
Write down 1 as next digit of the result. 
Result so far: 96431.0
If we take 899 away from 1005, we end up with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Let's proceed to step 9:
When dividing 1060 by 899, we get 1 with a remainder of 161.
The number 1 becomes the next digit in our result. 
Result so far: 96431.1
Subtract 899 from 1060 to get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Moving on to step 10:
If we divide 1610 by 899, we get 1 and a remainder of 711.
Record the quotient 1 as the next digit in the result. 
Result so far: 96431.11
The remainder is 711 after subtracting 899 from 1610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7110, and continue the process.

In conclusion, the division gives 96431.11 with a balance of 0.711.