836464 ÷ 90 
The aim is to understand the frequency of 90 in 836464.

Let's proceed to step 1:
8 divided by 90 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 90

Let's proceed to step 2:
90 goes into 83 0 times with a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Include the next digit (6) from the dividend after 83, then repeat: 836 / 90

Going ahead to step 3:
90 goes into 836 9 times with a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 810 from 836 to get 26.
Include the next digit (4) from the dividend after 26, then repeat: 264 / 90

Going ahead to step 4:
90 goes into 264 2 times with a remainder of 84.
Write down 2 as next digit of the result. 
Result so far: 92.0
Subtract 180 from 264 to get 84.
Append the next digit (6) from the dividend to 84 and continue with: 846 / 90

Moving on to step 5:
The number 90 fits into 846 9 times, leaving a remainder of 36.
The next digit of our result is 9. 
Result so far: 929.0
The remainder is 36 after subtracting 810 from 846.
Bring next digit (4) of the dividend behind the 36 and repeat the process: 364 / 90

On to step 6:
90 can be fit into 364 4 times, resulting in a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 9294.0
Deduct 360 from 364 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 7:
40 divided by 90 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 9294.0
Subtract 0 from 40 to get 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 8:
When dividing 400 by 90, we get 4 with a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 9294.04
If we subtract 360 from 400, we get 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:
90 goes into 400 4 times with a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 9294.044
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.

The final result is 9294.044 with a remainder of 0.004.