Let's divide 754566 by 9
The aim is to understand the frequency of 9 in 754566.

On to step 1:
The number 9 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 9

Step 2:
9 can be fit into 75 8 times, resulting in a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 72 from 75 to get 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 9

Advancing to step 3:
9 can be fit into 34 3 times, resulting in a remainder of 7.
The next digit of our result is 3. 
Result so far: 83.0
Subtract 27 from 34 to get 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 9

Going ahead to step 4:
The number 9 fits into 75 8 times, leaving a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 838.0
Deduct 72 from 75 and we're left with 3.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 9

Going ahead to step 5:
36 divided by 9 is 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 8384.0
Subtracting 36 from 36 leaves us with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 9

Step 6:
9 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: 83840.0
If we take 0 away from 6, 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.

Step 7:
9 can be fit into 60 6 times, resulting in a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 83840.6
Subtracting 54 from 60 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.

On to step 8:
When dividing 60 by 9, we get 6 with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 83840.66
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.

The final result is 83840.66 with a remainder of 0.006.