578115 ÷ 9 
The aim is to understand the frequency of 9 in 578115.

Let's proceed to step 1:
9 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 9

Moving on to step 2:
57 divided by 9 is 6 with a remainder of 3.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 3 after subtracting 54 from 57.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 9

Going ahead to step 3:
If we divide 38 by 9, we get 4 and a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
If we take 36 away from 38, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 9

Going ahead to step 4:
If we divide 21 by 9, we get 2 and a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 642.0
Subtracting 18 from 21 leaves us with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 9

Advancing to step 5:
The number 9 fits into 31 3 times, leaving a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 6423.0
Deduct 27 from 31 and we're left with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 9

On to step 6:
45 divided by 9 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 64235.0
If we take 45 away from 45, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
If we divide 0 by 9, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 64235.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 9 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 64235.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 64235.0, with a leftover of 0.0.