We divide 90409780 by 490
The aim is to understand the frequency of 490 in 90409780.

Advancing to step 1:
490 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 490

On to step 2:
When dividing 90 by 490, we get 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Fetch the next digit (4) from the dividend, attach it to 90 and continue: 904 / 490

Let's proceed to step 3:
The number 490 fits into 904 1 times, leaving a remainder of 414.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 490 from 904 to get 414.
Grab the next digit (0) from the dividend, add it to 414, then carry on: 4140 / 490

Going ahead to step 4:
When dividing 4140 by 490, we get 8 with a remainder of 220.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Subtracting 3920 from 4140 leaves us with 220.
Include the next digit (9) from the dividend after 220, then repeat: 2209 / 490

Moving on to step 5:
490 goes into 2209 4 times with a remainder of 249.
Put 4 as the next digit of the answer. 
Result so far: 184.0
Subtract 1960 from 2209 to get 249.
Grab the next digit (7) from the dividend, add it to 249, then carry on: 2497 / 490

Let's proceed to step 6:
When dividing 2497 by 490, we get 5 with a remainder of 47.
Write down 5 as next digit of the result. 
Result so far: 1845.0
If we take 2450 away from 2497, we end up with 47.
Include the next digit (8) from the dividend after 47, then repeat: 478 / 490

Advancing to step 7:
490 can be fit into 478 0 times, resulting in a remainder of 478.
Put 0 as the next digit of the answer. 
Result so far: 18450.0
Subtract 0 from 478 to get 478.
Bring next digit (0) of the dividend behind the 478 and repeat the process: 4780 / 490

Let's proceed to step 8:
490 goes into 4780 9 times with a remainder of 370.
The next digit of our result is 9. 
Result so far: 184509.0
Subtract 4410 from 4780 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Let's proceed to step 9:
The number 490 fits into 3700 7 times, leaving a remainder of 270.
The number 7 becomes the next digit in our result. 
Result so far: 184509.7
If we subtract 3430 from 3700, we get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Advancing to step 10:
490 can be fit into 2700 5 times, resulting in a remainder of 250.
Put 5 as the next digit of the answer. 
Result so far: 184509.75
The remainder is 250 after subtracting 2450 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Advancing to step 11:
When dividing 2500 by 490, we get 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 184509.755
If we take 2450 away from 2500, 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.

Our division results in 184509.755 with a remaining 0.005.