458213 ÷ 90 
The aim is to understand the frequency of 90 in 458213.

Let's proceed to step 1:
The number 90 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 90

On to step 2:
When dividing 45 by 90, we get 0 with a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Take the next digit (8) from the dividend and append it to 45, then repeat: 458 / 90

Going ahead to step 3:
If we divide 458 by 90, we get 5 and a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 450 away from 458, we end up with 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 90

Going ahead to step 4:
90 can be fit into 82 0 times, resulting in a remainder of 82.
Write down 0 as next digit of the result. 
Result so far: 50.0
Deduct 0 from 82 and we're left with 82.
Fetch the next digit (1) from the dividend, attach it to 82 and continue: 821 / 90

Let's proceed to step 5:
If we divide 821 by 90, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 509.0
The remainder is 11 after subtracting 810 from 821.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 90

Let's proceed to step 6:
When dividing 113 by 90, we get 1 with a remainder of 23.
Record the quotient 1 as the next digit in the result. 
Result so far: 5091.0
Subtracting 90 from 113 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
230 divided by 90 is 2 with a remainder of 50.
Write down 2 as next digit of the result. 
Result so far: 5091.2
Subtract 180 from 230 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.

On to step 8:
500 divided by 90 is 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 5091.25
Subtracting 450 from 500 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.

Going ahead to step 9:
When dividing 500 by 90, we get 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 5091.255
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 5091.255, and the remainder is 0.005.