Let's divide 790222 by 90
The aim is to understand the frequency of 90 in 790222.

Going ahead to step 1:
If we divide 7 by 90, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 90

Moving on to step 2:
79 divided by 90 is 0 with a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Grab the next digit (0) from the dividend, add it to 79, then carry on: 790 / 90

Step 3:
The number 90 fits into 790 8 times, leaving a remainder of 70.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 720 from 790, we get 70.
Append the next digit (2) from the dividend to 70 and continue with: 702 / 90

Step 4:
90 goes into 702 7 times with a remainder of 72.
The number 7 becomes the next digit in our result. 
Result so far: 87.0
Deduct 630 from 702 and we're left with 72.
Grab the next digit (2) from the dividend, add it to 72, then carry on: 722 / 90

Let's proceed to step 5:
90 can be fit into 722 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 878.0
The remainder is 2 after subtracting 720 from 722.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 90

Let's proceed to step 6:
If we divide 22 by 90, we get 0 and a remainder of 22.
Put 0 as the next digit of the answer. 
Result so far: 8780.0
Deduct 0 from 22 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 7:
90 can be fit into 220 2 times, resulting in a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 8780.2
The remainder is 40 after subtracting 180 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 8780.24
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
90 goes into 400 4 times with a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 8780.244
If we take 360 away from 400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Our division results in 8780.244 with a remaining 0.004.