We look at the division of 67580405 by 9 
The aim is to understand the frequency of 9 in 67580405.

Let's proceed to step 1:
6 divided by 9 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 9

Advancing to step 2:
67 divided by 9 is 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 63 from 67 to get 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 9

Let's proceed to step 3:
When dividing 45 by 9, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 75.0
Subtracting 45 from 45 leaves us with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 9

Advancing to step 4:
When dividing 8 by 9, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 750.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 9

Step 5:
9 can be fit into 80 8 times, resulting in a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 7508.0
The remainder is 8 after subtracting 72 from 80.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 9

Moving on to step 6:
9 can be fit into 84 9 times, resulting in a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 75089.0
Deduct 81 from 84 and we're left with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 9

Let's proceed to step 7:
When dividing 30 by 9, we get 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 750893.0
If we take 27 away from 30, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 9

On to step 8:
9 goes into 35 3 times with a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 7508933.0
Subtracting 27 from 35 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
When dividing 80 by 9, we get 8 with a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 7508933.8
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 10:
The number 9 fits into 80 8 times, leaving a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 7508933.88
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 7508933.88 with a remaining 0.008.