Let's divide 615858 by 9
The aim is to understand the frequency of 9 in 615858.

Step 1:
6 divided by 9 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 9

Advancing to step 2:
61 divided by 9 is 6 with a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 54 from 61, we get 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 9

Advancing to step 3:
75 divided by 9 is 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
The remainder is 3 after subtracting 72 from 75.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 9

Moving on to step 4:
If we divide 38 by 9, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 684.0
If we subtract 36 from 38, we get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 9

Step 5:
When dividing 25 by 9, we get 2 with a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 6842.0
Subtract 18 from 25 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 9

Step 6:
78 divided by 9 is 8 with a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 68428.0
The remainder is 6 after subtracting 72 from 78.
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:
The number 9 fits into 60 6 times, leaving a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 68428.6
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.

Step 8:
9 goes into 60 6 times with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 68428.66
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.

Our division results in 68428.66 with a remaining 0.006.