We divide 497389 by 90
The aim is to understand the frequency of 90 in 497389.

Going ahead to step 1:
4 divided by 90 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 90

Let's proceed to step 2:
When dividing 49 by 90, we get 0 with a remainder of 49.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 49 after subtracting 0 from 49.
Append the next digit (7) from the dividend to 49 and continue with: 497 / 90

Moving on to step 3:
90 goes into 497 5 times with a remainder of 47.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtract 450 from 497 to get 47.
Fetch the next digit (3) from the dividend, attach it to 47 and continue: 473 / 90

Step 4:
The number 90 fits into 473 5 times, leaving a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 55.0
Subtract 450 from 473 to get 23.
Take the next digit (8) from the dividend and append it to 23, then repeat: 238 / 90

Moving on to step 5:
When dividing 238 by 90, we get 2 with a remainder of 58.
Record the quotient 2 as the next digit in the result. 
Result so far: 552.0
If we subtract 180 from 238, we get 58.
Include the next digit (9) from the dividend after 58, then repeat: 589 / 90

Advancing to step 6:
90 goes into 589 6 times with a remainder of 49.
The number 6 becomes the next digit in our result. 
Result so far: 5526.0
The remainder is 49 after subtracting 540 from 589.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 7:
90 goes into 490 5 times with a remainder of 40.
Write down 5 as next digit of the result. 
Result so far: 5526.5
If we take 450 away from 490, we end up 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.

Going ahead to step 8:
400 divided by 90 is 4 with a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 5526.54
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.

Step 9:
The number 90 fits into 400 4 times, leaving a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 5526.544
If we take 360 away from 400, we end up 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.

Our division results in 5526.544 with a remaining 0.004.