603780 divided by 9 
The aim is to understand the frequency of 9 in 603780.

Let's proceed to step 1:
9 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 9

Going ahead to step 2:
If we divide 60 by 9, we get 6 and a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 54 from 60 and we're left with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 9

On to step 3:
When dividing 63 by 9, we get 7 with a remainder of 0.
The next digit of our result is 7. 
Result so far: 67.0
Deduct 63 from 63 and we're left with 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 9

Moving on to step 4:
The number 9 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 670.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 9

Advancing to step 5:
78 divided by 9 is 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 6708.0
Deduct 72 from 78 and we're left with 6.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 9

Going ahead to step 6:
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: 67086.0
Subtract 54 from 60 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
The number 9 fits into 60 6 times, leaving a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 67086.6
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:
The number 9 fits into 60 6 times, leaving a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 67086.66
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.

After the division, we end up with 67086.66 and a remainder of 0.006.