792039 ÷ 90 
The aim is to understand the frequency of 90 in 792039.

Step 1:
90 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 90

Going ahead to step 2:
90 can be fit into 79 0 times, resulting in a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 79 and we're left with 79.
Fetch the next digit (2) from the dividend, attach it to 79 and continue: 792 / 90

Advancing to step 3:
90 can be fit into 792 8 times, resulting in a remainder of 72.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 720 away from 792, we end up with 72.
Grab the next digit (0) from the dividend, add it to 72, then carry on: 720 / 90

Advancing to step 4:
90 goes into 720 8 times with a remainder of 0.
The next digit of our result is 8. 
Result so far: 88.0
If we take 720 away from 720, we end up with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 90

Moving on to step 5:
3 divided by 90 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 880.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 90

Advancing to step 6:
39 divided by 90 is 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 8800.0
If we subtract 0 from 39, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 7:
90 can be fit into 390 4 times, resulting in a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 8800.4
If we take 360 away from 390, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
90 goes into 300 3 times with a remainder of 30.
The next digit of our result is 3. 
Result so far: 8800.43
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 8800.433
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 8800.433, with a leftover of 0.003.