We divide 823930 by 90
The aim is to understand the frequency of 90 in 823930.

Going ahead to step 1:
The number 90 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 90

Going ahead to step 2:
90 goes into 82 0 times with a remainder of 82.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 82, we get 82.
Fetch the next digit (3) from the dividend, attach it to 82 and continue: 823 / 90

Step 3:
The number 90 fits into 823 9 times, leaving a remainder of 13.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 810 from 823 and we're left with 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 90

Going ahead to step 4:
The number 90 fits into 139 1 times, leaving a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 91.0
The remainder is 49 after subtracting 90 from 139.
Append the next digit (3) from the dividend to 49 and continue with: 493 / 90

Advancing to step 5:
The number 90 fits into 493 5 times, leaving a remainder of 43.
The number 5 becomes the next digit in our result. 
Result so far: 915.0
Subtract 450 from 493 to get 43.
Include the next digit (0) from the dividend after 43, then repeat: 430 / 90

Step 6:
If we divide 430 by 90, we get 4 and a remainder of 70.
Use 4 as the next digit of our solution. 
Result so far: 9154.0
If we take 360 away from 430, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 7:
90 can be fit into 700 7 times, resulting in a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 9154.7
If we take 630 away from 700, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
The number 90 fits into 700 7 times, leaving a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 9154.77
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 9154.77, and the remainder is 0.07.