We divide 20184880 by 90
The aim is to understand the frequency of 90 in 20184880.

Moving on to step 1:
90 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 90

Going ahead to step 2:
The number 90 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 90

Step 3:
90 can be fit into 201 2 times, resulting in a remainder of 21.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 180 from 201 to get 21.
Take the next digit (8) from the dividend and append it to 21, then repeat: 218 / 90

On to step 4:
If we divide 218 by 90, we get 2 and a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Subtracting 180 from 218 leaves us with 38.
Include the next digit (4) from the dividend after 38, then repeat: 384 / 90

Advancing to step 5:
If we divide 384 by 90, we get 4 and a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 224.0
If we take 360 away from 384, we end up with 24.
Bring next digit (8) of the dividend behind the 24 and repeat the process: 248 / 90

Moving on to step 6:
The number 90 fits into 248 2 times, leaving a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 2242.0
Subtracting 180 from 248 leaves us with 68.
Take the next digit (8) from the dividend and append it to 68, then repeat: 688 / 90

Step 7:
If we divide 688 by 90, we get 7 and a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 22427.0
Deduct 630 from 688 and we're left with 58.
Append the next digit (0) from the dividend to 58 and continue with: 580 / 90

Step 8:
If we divide 580 by 90, we get 6 and a remainder of 40.
Put 6 as the next digit of the answer. 
Result so far: 224276.0
The remainder is 40 after subtracting 540 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
When dividing 400 by 90, we get 4 with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 224276.4
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 10:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 224276.44
Subtract 360 from 400 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.

The quotient of the division is 224276.44, and the remainder is 0.04.