621556 ÷ 9 
The aim is to understand the frequency of 9 in 621556.

Step 1:
If we divide 6 by 9, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 9

Step 2:
9 goes into 62 6 times with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 8 after subtracting 54 from 62.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 9

Advancing to step 3:
9 goes into 81 9 times with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 69.0
The remainder is 0 after subtracting 81 from 81.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 9

Let's proceed to step 4:
The number 9 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 690.0
Subtract 0 from 5 to get 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 9

On to step 5:
9 can be fit into 55 6 times, resulting in a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 6906.0
Subtract 54 from 55 to get 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 9

Moving on to step 6:
9 goes into 16 1 times with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 69061.0
The remainder is 7 after subtracting 9 from 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
If we divide 70 by 9, we get 7 and a remainder of 7.
The next digit of our result is 7. 
Result so far: 69061.7
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
If we divide 70 by 9, we get 7 and a remainder of 7.
The next digit of our result is 7. 
Result so far: 69061.77
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.

In conclusion, the division gives 69061.77 with a balance of 0.007.