We look at the division of 223770 by 9 
The aim is to understand the frequency of 9 in 223770.

Step 1:
The number 9 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 9

On to step 2:
If we divide 22 by 9, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 4 after subtracting 18 from 22.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 9

Step 3:
43 divided by 9 is 4 with a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 24.0
Subtracting 36 from 43 leaves us with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 9

Step 4:
9 can be fit into 77 8 times, resulting in a remainder of 5.
The next digit of our result is 8. 
Result so far: 248.0
If we take 72 away from 77, we end up with 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 9

Going ahead to step 5:
9 goes into 57 6 times with a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 2486.0
If we take 54 away from 57, we end up with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 9

Step 6:
30 divided by 9 is 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 24863.0
If we subtract 27 from 30, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
30 divided by 9 is 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 24863.3
Deduct 27 from 30 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
If we divide 30 by 9, we get 3 and a remainder of 3.
The next digit of our result is 3. 
Result so far: 24863.33
If we take 27 away from 30, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

After the division, we end up with 24863.33 and a remainder of 0.003.