712819 divided by 9 
The aim is to understand the frequency of 9 in 712819.

On to step 1:
When dividing 7 by 9, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 9

Step 2:
The number 9 fits into 71 7 times, leaving a remainder of 8.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 63 from 71, we get 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 9

Moving on to step 3:
82 divided by 9 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
The remainder is 1 after subtracting 81 from 82.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 9

Step 4:
9 can be fit into 18 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 792.0
Subtract 18 from 18 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 9

Going ahead to step 5:
9 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 7920.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 9

Moving on to step 6:
9 goes into 19 2 times with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 79202.0
If we take 18 away from 19, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
9 can be fit into 10 1 times, resulting in a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 79202.1
If we subtract 9 from 10, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
If we divide 10 by 9, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 79202.11
If we take 9 away from 10, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 79202.11 with a remainder of 0.001.