We divide 491175 by 90
The aim is to understand the frequency of 90 in 491175.

On to step 1:
90 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 90

Moving on to step 2:
If we divide 49 by 90, we get 0 and a remainder of 49.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 49 to get 49.
Fetch the next digit (1) from the dividend, attach it to 49 and continue: 491 / 90

Let's proceed to step 3:
When dividing 491 by 90, we get 5 with a remainder of 41.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 41 after subtracting 450 from 491.
Grab the next digit (1) from the dividend, add it to 41, then carry on: 411 / 90

Moving on to step 4:
When dividing 411 by 90, we get 4 with a remainder of 51.
Write down 4 as next digit of the result. 
Result so far: 54.0
If we subtract 360 from 411, we get 51.
Grab the next digit (7) from the dividend, add it to 51, then carry on: 517 / 90

Advancing to step 5:
The number 90 fits into 517 5 times, leaving a remainder of 67.
Put 5 as the next digit of the answer. 
Result so far: 545.0
If we subtract 450 from 517, we get 67.
Take the next digit (5) from the dividend and append it to 67, then repeat: 675 / 90

On to step 6:
675 divided by 90 is 7 with a remainder of 45.
Write down 7 as next digit of the result. 
Result so far: 5457.0
If we take 630 away from 675, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 7:
The number 90 fits into 450 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 5457.5
If we subtract 450 from 450, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
If we divide 0 by 90, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 5457.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
0 divided by 90 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5457.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 5457.5 with a remainder of 0.0.