802842 ÷ 90 
The aim is to understand the frequency of 90 in 802842.

Let's proceed to step 1:
90 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 90

Going ahead to step 2:
80 divided by 90 is 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Include the next digit (2) from the dividend after 80, then repeat: 802 / 90

Moving on to step 3:
When dividing 802 by 90, we get 8 with a remainder of 82.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 720 from 802 leaves us with 82.
Bring next digit (8) of the dividend behind the 82 and repeat the process: 828 / 90

Advancing to step 4:
90 goes into 828 9 times with a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 89.0
If we take 810 away from 828, we end up with 18.
Take the next digit (4) from the dividend and append it to 18, then repeat: 184 / 90

On to step 5:
The number 90 fits into 184 2 times, leaving a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 892.0
Subtract 180 from 184 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 90

Going ahead to step 6:
When dividing 42 by 90, we get 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 8920.0
If we take 0 away from 42, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 7:
The number 90 fits into 420 4 times, leaving a remainder of 60.
Use 4 as the next digit of our solution. 
Result so far: 8920.4
Subtracting 360 from 420 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 8920.46
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 8920.466
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final result is 8920.466 with a remainder of 0.006.