864883 ÷ 90 
The aim is to understand the frequency of 90 in 864883.

On to step 1:
90 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 90

Moving on to step 2:
The number 90 fits into 86 0 times, leaving a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Fetch the next digit (4) from the dividend, attach it to 86 and continue: 864 / 90

Going ahead to step 3:
864 divided by 90 is 9 with a remainder of 54.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 810 from 864 leaves us with 54.
Take the next digit (8) from the dividend and append it to 54, then repeat: 548 / 90

Advancing to step 4:
90 goes into 548 6 times with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 96.0
If we take 540 away from 548, we end up with 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 90

Advancing to step 5:
90 goes into 88 0 times with a remainder of 88.
Record the quotient 0 as the next digit in the result. 
Result so far: 960.0
If we take 0 away from 88, we end up with 88.
Take the next digit (3) from the dividend and append it to 88, then repeat: 883 / 90

Moving on to step 6:
90 can be fit into 883 9 times, resulting in a remainder of 73.
Use 9 as the next digit of our solution. 
Result so far: 9609.0
The remainder is 73 after subtracting 810 from 883.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 7:
When dividing 730 by 90, we get 8 with a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 9609.8
The remainder is 10 after subtracting 720 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
90 goes into 100 1 times with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 9609.81
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
100 divided by 90 is 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 9609.811
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 9609.811 with a balance of 0.001.