Let's divide 865220 by 90
The aim is to understand the frequency of 90 in 865220.

On to step 1:
90 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 90

Going ahead to step 2:
86 divided by 90 is 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Bring next digit (5) of the dividend behind the 86 and repeat the process: 865 / 90

Moving on to step 3:
90 can be fit into 865 9 times, resulting in a remainder of 55.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 810 from 865, we get 55.
Fetch the next digit (2) from the dividend, attach it to 55 and continue: 552 / 90

Moving on to step 4:
90 goes into 552 6 times with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
Subtracting 540 from 552 leaves us with 12.
Append the next digit (2) from the dividend to 12 and continue with: 122 / 90

Step 5:
The number 90 fits into 122 1 times, leaving a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 961.0
Subtracting 90 from 122 leaves us with 32.
Grab the next digit (0) from the dividend, add it to 32, then carry on: 320 / 90

Let's proceed to step 6:
If we divide 320 by 90, we get 3 and a remainder of 50.
The number 3 becomes the next digit in our result. 
Result so far: 9613.0
Subtract 270 from 320 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 7:
500 divided by 90 is 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 9613.5
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 8:
When dividing 500 by 90, we get 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 9613.55
If we take 450 away from 500, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 9613.55, and the remainder is 0.05.