844286 ÷ 90 
The aim is to understand the frequency of 90 in 844286.

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
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 90

Advancing to step 2:
84 divided by 90 is 0 with a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Take the next digit (4) from the dividend and append it to 84, then repeat: 844 / 90

Advancing to step 3:
If we divide 844 by 90, we get 9 and a remainder of 34.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 810 from 844 to get 34.
Grab the next digit (2) from the dividend, add it to 34, then carry on: 342 / 90

Moving on to step 4:
90 can be fit into 342 3 times, resulting in a remainder of 72.
Put 3 as the next digit of the answer. 
Result so far: 93.0
Subtract 270 from 342 to get 72.
Append the next digit (8) from the dividend to 72 and continue with: 728 / 90

Going ahead to step 5:
The number 90 fits into 728 8 times, leaving a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 938.0
Deduct 720 from 728 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 90

Let's proceed to step 6:
When dividing 86 by 90, we get 0 with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 9380.0
If we take 0 away from 86, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 7:
860 divided by 90 is 9 with a remainder of 50.
Record the quotient 9 as the next digit in the result. 
Result so far: 9380.9
Subtracting 810 from 860 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
500 divided by 90 is 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 9380.95
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
90 goes into 500 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 9380.955
If we take 450 away from 500, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 9380.955, and the remainder is 0.005.