We're dividing 835222 by 90 
The aim is to understand the frequency of 90 in 835222.

Let's proceed to step 1:
When dividing 8 by 90, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 90

Advancing to step 2:
When dividing 83 by 90, we get 0 with a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 83 after subtracting 0 from 83.
Include the next digit (5) from the dividend after 83, then repeat: 835 / 90

Step 3:
90 goes into 835 9 times with a remainder of 25.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 810 from 835, we get 25.
Append the next digit (2) from the dividend to 25 and continue with: 252 / 90

On to step 4:
252 divided by 90 is 2 with a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 92.0
Deduct 180 from 252 and we're left with 72.
Include the next digit (2) from the dividend after 72, then repeat: 722 / 90

Let's proceed to step 5:
90 can be fit into 722 8 times, resulting in a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 928.0
Subtract 720 from 722 to get 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 90

On to step 6:
The number 90 fits into 22 0 times, leaving a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 9280.0
Subtract 0 from 22 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
The number 90 fits into 220 2 times, leaving a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 9280.2
If we take 180 away from 220, 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.

On to step 8:
The number 90 fits into 400 4 times, leaving a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 9280.24
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.

Let's proceed to step 9:
When dividing 400 by 90, we get 4 with a remainder of 40.
The next digit of our result is 4. 
Result so far: 9280.244
Subtracting 360 from 400 leaves us 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.

The final outcome is 9280.244, with a leftover of 0.004.