Let's divide 79288430 by 90
The aim is to understand the frequency of 90 in 79288430.

Moving on to step 1:
7 divided by 90 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 90

Going ahead to step 2:
The number 90 fits into 79 0 times, leaving a remainder of 79.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 79, we end up with 79.
Bring next digit (2) of the dividend behind the 79 and repeat the process: 792 / 90

Let's proceed to step 3:
90 goes into 792 8 times with a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 720 from 792 and we're left with 72.
Take the next digit (8) from the dividend and append it to 72, then repeat: 728 / 90

On to step 4:
90 goes into 728 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 88.0
Subtract 720 from 728 to get 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 90

Step 5:
The number 90 fits into 88 0 times, leaving a remainder of 88.
Record the quotient 0 as the next digit in the result. 
Result so far: 880.0
The remainder is 88 after subtracting 0 from 88.
Fetch the next digit (4) from the dividend, attach it to 88 and continue: 884 / 90

Let's proceed to step 6:
The number 90 fits into 884 9 times, leaving a remainder of 74.
Use 9 as the next digit of our solution. 
Result so far: 8809.0
Subtract 810 from 884 to get 74.
Include the next digit (3) from the dividend after 74, then repeat: 743 / 90

Step 7:
743 divided by 90 is 8 with a remainder of 23.
Write down 8 as next digit of the result. 
Result so far: 88098.0
Deduct 720 from 743 and we're left with 23.
Append the next digit (0) from the dividend to 23 and continue with: 230 / 90

Step 8:
The number 90 fits into 230 2 times, leaving a remainder of 50.
Put 2 as the next digit of the answer. 
Result so far: 880982.0
If we take 180 away from 230, 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.

Moving on to step 9:
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: 880982.5
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.

Let's proceed to step 10:
500 divided by 90 is 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 880982.55
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.

The final result is 880982.55 with a remainder of 0.05.