We divide 664071 by 9
The aim is to understand the frequency of 9 in 664071.

Step 1:
6 divided by 9 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 9

Going ahead to step 2:
9 goes into 66 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 3 after subtracting 63 from 66.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 9

Going ahead to step 3:
9 goes into 34 3 times with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 73.0
If we take 27 away from 34, we end up with 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 9

Advancing to step 4:
If we divide 70 by 9, we get 7 and a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 737.0
Subtracting 63 from 70 leaves us with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 9

Going ahead to step 5:
9 can be fit into 77 8 times, resulting in a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 7378.0
Subtracting 72 from 77 leaves us with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 9

On to step 6:
9 can be fit into 51 5 times, resulting in a remainder of 6.
Record the quotient 5 as the next digit in the result. 
Result so far: 73785.0
Subtracting 45 from 51 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
If we divide 60 by 9, we get 6 and a remainder of 6.
The next digit of our result is 6. 
Result so far: 73785.6
Deduct 54 from 60 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
9 goes into 60 6 times with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 73785.66
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

In conclusion, the division gives 73785.66 with a balance of 0.006.