We divide 86644 by 9
The aim is to understand the frequency of 9 in 86644.

On to step 1:
If we divide 8 by 9, we get 0 and 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.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 9

Let's proceed to step 2:
9 goes into 86 9 times with a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 5 after subtracting 81 from 86.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 9

Step 3:
56 divided by 9 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 96.0
The remainder is 2 after subtracting 54 from 56.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 9

On to step 4:
24 divided by 9 is 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 962.0
Deduct 18 from 24 and we're left with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 9

Step 5:
When dividing 64 by 9, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 9627.0
Subtract 63 from 64 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 6:
10 divided by 9 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 9627.1
Subtracting 9 from 10 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
When dividing 10 by 9, we get 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 9627.11
If we subtract 9 from 10, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 9627.11 with a remainder of 0.001.