286810 ÷ 9 
The aim is to understand the frequency of 9 in 286810.

On to step 1:
The number 9 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 9

Moving on to step 2:
The number 9 fits into 28 3 times, leaving a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 27 from 28 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 9

Let's proceed to step 3:
When dividing 16 by 9, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 31.0
If we subtract 9 from 16, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 9

Advancing to step 4:
If we divide 78 by 9, we get 8 and a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 318.0
If we take 72 away from 78, we end up with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 9

Moving on to step 5:
The number 9 fits into 61 6 times, leaving a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 3186.0
Subtracting 54 from 61 leaves us with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 9

Moving on to step 6:
If we divide 70 by 9, we get 7 and a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 31867.0
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
When dividing 70 by 9, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 31867.7
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 8:
The number 9 fits into 70 7 times, leaving a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 31867.77
Subtracting 63 from 70 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 31867.77 and a remainder of 0.007.